scholarly journals Synthetic rutile derived titanium alloy development utilising the Metalysis Process and field assisted sintering technology

2020 ◽  
Vol 321 ◽  
pp. 07001
Author(s):  
Simon J. Graham ◽  
Lyndsey L. Benson ◽  
Martin Jackson
Keyword(s):  
Titanium Alloy ◽  
Metal Extraction ◽  
Metal Powders ◽  
Alloy Development ◽  
Processing Technologies ◽  
Synthetic Rutile ◽  
Production Route ◽  
Oxide Powders ◽  
The Cost ◽  
Field Assisted Sintering

Utilising novel extraction and processing technologies allows for the realisation of an alternative titanium alloy production route, with many benefits over the traditional Kroll-based one. The route proposed has the potential to reduce the cost of titanium and offers the ability to create alloys which are difficult to make conventionally. It combines the Metalysis Process, an electrolytic metal extraction technique, with field assisted sintering technology (FAST), a rapid and effective solid-state sintering technique. The Metalysis Process reduces metal oxide powders directly into metal powders, which can then be consolidated using FAST. Using synthetic rutile (SR) as the feedstock, compared to pigment grade rutile and TiCl4, further reduces the cost of titanium produced via this route. This research investigates the use of this route to create a range of pseudo-binary Ti-Fe alloys, by co-reducing SR with iron (III) oxide (Fe O ). Various techniques were used to analyse the feedstock, reduced alloy powders and consolidated material post-FAST to 23 determine chemistry and microstructure.

scholarly journals Production of spherical titanium alloy powders used in additive manufacturing from titanium scrap

2020 ◽  
Vol 321 ◽  
pp. 07008
Author(s):  
Taras Yanko ◽  
Viktor Brener ◽  
Olexandr Ovchinnikov
Keyword(s):  
Titanium Alloy ◽  
3D Printing ◽  
Raw Materials ◽  
Raw Material ◽  
Chemical Compositions ◽  
Metal Powders ◽  
Hydrogen Recovery ◽  
Production Route ◽  
Actual Yield ◽  
Technical Solutions

The main materials for 3D printing of titanium are fine metal alloy powders from which produce final articles with required quality. These powders must have definite chemical compositions, physical/mechanical characteristics, and also necessary operational properties. Key parameters of titanium alloy powders are homogeneity of chemical compositions, microstructures as well as flow ability. Conventional atomisation methods for metal powders like GA, PREP, PA, etc, are complicated and sufficiently expensive. Alternative production route is usage of complex processing technology of titanium alloy scrap as initial raw material. Spheriodised powder manufacturing scheme which includes raw material preparation, preliminary and final treatments have been presented. At the first step titanium scrap was divided according to titanium alloy types, purified from contaminants and oxide films. Then prepared materials were converted to non-spherical powders with definite fractional compositions using hydrogenation/de-hydrogenation (HDH) method. Experimental HDH equipment allows close cycle of hydrogen recovery almost without losses. Obtained non-spherical powders were treated in the plasma unit yielding spherical titanium alloy. Offered technical solutions permit production of raw materials for 3D printing from scrap with high actual yield of required fractional compositions.

scholarly journals Enhanced Thermoelectric Performance of n-Type Bi2Se3 Nanosheets through Sn Doping

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1827
Author(s):  
Mengyao Li ◽  
Yu Zhang ◽  
Ting Zhang ◽  
Yong Zuo ◽  
Ke Xiao ◽  
...  
Keyword(s):  
Figure Of Merit ◽  
Cost Effective ◽  
Low Grade ◽  
Hot Press ◽  
Processing Technologies ◽  
Sn Doping ◽  
Practical Applications ◽  
Alternative Materials ◽  
The Cost ◽  
Low Grade Heat

The cost-effective conversion of low-grade heat into electricity using thermoelectric devices requires developing alternative materials and material processing technologies able to reduce the currently high device manufacturing costs. In this direction, thermoelectric materials that do not rely on rare or toxic elements such as tellurium or lead need to be produced using high-throughput technologies not involving high temperatures and long processes. Bi2Se3 is an obvious possible Te-free alternative to Bi2Te3 for ambient temperature thermoelectric applications, but its performance is still low for practical applications, and additional efforts toward finding proper dopants are required. Here, we report a scalable method to produce Bi2Se3 nanosheets at low synthesis temperatures. We studied the influence of different dopants on the thermoelectric properties of this material. Among the elements tested, we demonstrated that Sn doping resulted in the best performance. Sn incorporation resulted in a significant improvement to the Bi2Se3 Seebeck coefficient and a reduction in the thermal conductivity in the direction of the hot-press axis, resulting in an overall 60% improvement in the thermoelectric figure of merit of Bi2Se3.

The current issues of using innovative solutions in waste-free management systems

2021 ◽  
pp. 136-148
Author(s):  
Olga Vytvytska ◽  
Mykyt Pundyk
Keyword(s):  
Raw Materials ◽  
Waste Recycling ◽  
Household Waste ◽  
Management Systems ◽  
Energy Technology ◽  
Processing Technologies ◽  
Management Technology ◽  
Innovative Solutions ◽  
The Cost ◽  
Theoretical Foundations

The purpose of the article. The purpose of the study is to substantiate the theoretical foundations and practical innovative solutions for the reuse of waste resources with a proposal for improved waste management technology with prospects for implementation in Ukraine. Research methodology: theoretical and practical aspects of the introduction and implementation of eco-management, because for Ukraine such an approach to the introduction of innovative processing technologies in enterprises is completely new. Methodical toolkit of substantiation of innovative decisions of reuse of resources from waste, structure of prime cost of the improved system for the Goloseevsky area. Kiev. Scientific novelty. It is proposed to optimize the existing garbage problem in most regions and replace waste trucks based on the method of the pneumatic system manufactured by Envac. The system allows you to reduce the cost of moving cargo over time sorting or disposal points. Conclusions. The introduction of innovative systems in Ukraine for the year saves UAH 34 billion 499 million, in addition, the sorting of household waste is gaining popularity, recycling tanks are being installed in cities, the population is beginning to treat waste with understanding, and a behavioral strategy has been introduced to stimulate waste recycling. In addition, the proposed technology of sorting raw materials allows you to sort up to 97% of household waste, and the rest to burn for energy. All this makes the development of the processing industry in Ukraine promising. Keywords: innovations, waste-free systems, secondary raw materials, energy, technology.

Improving the efficiency of metal-bonded diamond abrasive end tools by improving manufacturing technology

2021 ◽  
Vol 23 (2) ◽  
pp. 66-80
Author(s):  
Valentin Smirnov ◽  
◽  
Dmitry Lobanov ◽  
Vadim Skeeba ◽  
Ivan Golyushov ◽  
...  
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Carbon Steels ◽  
Manufacturing Technology ◽  
The Body ◽  
Processing Technologies ◽  
Medium Carbon ◽  
The Cost ◽  
Diamond Abrasive ◽  
Bearing Part

Introduction. Difficult-to-machine materials with enhanced physical and mechanical properties are increasingly being used in various industries. Such materials are used in mechanical engineering for the manufacture of parts and assemblies of machines and mechanisms, in the production and processing of food products where increased operational requirements are required. In modern production, along with traditional methods of intensifying technological operations, combined and hybrid processing technologies are used. For the finishing of products, abrasive grinding with a diamond tool is used. One of the problems hindering the wide practical application of this method in industry is the fact that it has a high prime cost caused by the cost of materials used in the manufacture and the laboriousness of the tool shaping process. This leads to the need to develop a new technology for manufacturing diamond tools. The purpose of the work is to increase the efficiency of the end diamond abrasive tool with a metal bond by using carbon steels as a body material, increasing the strength of the connection between the body and the diamond-bearing part, as well as choosing an effective tool manufacturing technology. Research methodology. To gain this task, a technology for manufacturing end diamond abrasive tools is developed and tested. Allowing using the technology of capacitor welding to connect the diamond-bearing part with the shank and use medium-carbon hardened high-quality steels with a hardness of 45-60 HRC as the shank material. The strength of the connection of the body with the working diamond-bearing part of the grinding head samples is determined by tensile testing on a 1958U10 tensile machine with maximum load 100 kN. The quality of the joint is assessed visually by the presence of discontinuities in the joint, as well as by examining the microstructure and measuring the microhardness of the weld and heat-affected zones. The microhardness of the welded joint is measured using an HMV-G21ST semi-automatic microhardness tester (Shimadzu, Japan) at a load of 50 g. Results and discussion. Thus, the results of comparative studies allow us to assert that the strength of the connection between the shank and the working diamond-bearing part according to the proposed technology surpasses similar characteristics of the strength of the connection between the shank and the diamond-bearing layer of grinding heads obtained by the method selected by the prototype. Conclusions. The proposed technology for the manufacture of diamond heads increases the strength of the connection between the body and the diamond-bearing working part, reduces the cost of manufacturing the grinding heads due to the use of hardened medium-carbon steels as the material of the tool body instead of high-speed steel grades, the technology is simplified and the possibility of automating the manufacture of tools appears.

scholarly journals Recent Studies and Developments in Titanium Biomaterials

2020 ◽  
Vol 321 ◽  
pp. 02004
Author(s):  
M. Ikedaa ◽  
M. Ueda ◽  
M. Ninomi
Keyword(s):  
Health Care ◽  
Additive Manufacturing ◽  
Titanium Alloys ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Layer By Layer ◽  
Metal Powders ◽  
Alloy Development ◽  
Dental Surgery ◽  
Artificial Bones

Titanium and its alloys have a high specific strength, excellent corrosion resistance, and good biocompatibility. Therefore, these alloys are adopted as raw materials for artificial bones and joints. Furthermore, these alloys are used as materials for dental surgery. In the development of alloy design, beta-type titanium alloys that possess a lower Young’s modulus than other types of titanium alloys, e.g., Ti-6Al-4V alpha-beta-type alloys, are being actively investigated worldwide. Based on these studies, titanium-niobium-tantalum and zirconium system alloys were developed. For example, Ti-29Nb-13Ta-4.6Zr alloy has a low Young’s modulus, excellent biocompatibility, and improved mechanical properties. Many researchers are actively investigating surface modifications and surface treatments. Additive manufacturing, namely 3D printing, wherein metal powders are piled up layer by layer to produce goods without a mold, has attracted attention in many fields, including manufacture of implants, especially porous structural implants with a low Young’s modulus. It is very important that titanium and its alloys be applied to health-care goods, e.g., wheelchairs and prostheses. Therefore, we herein consider four topics: alloy development, coating and surface modification, additive manufacturing, and health care applications.

Approaches to the Design and Processing of Novel Titanium Alloys

2007 ◽  
Vol 29-30 ◽  
pp. 127-130
Author(s):  
Colleen J. Bettles ◽  
Rimma Lapovok ◽  
H.P. Ng ◽  
Dacian Tomus ◽  
Barry C. Muddle
Keyword(s):  
Titanium Alloys ◽  
High Performance ◽  
Powder Processing ◽  
Low Cost ◽  
Cost Effective ◽  
Processing Technologies ◽  
Shape Processing ◽  
New Processing ◽  
The Cost ◽  
Processing Techniques

The range of commercial titanium alloys available is currently extremely restricted, with one alloy (Ti-6Al-4V), and derivatives of it, accounting for a very large proportion of all applications. High performance alloys are costly to fabricate and limited to low-volume applications that can sustain the cost. With the emergence of new processing technologies that promise to reduce significantly the cost of production of titanium metal, especially in powder form, there is an emerging imperative for cost-effective near net shape powder processing techniques to permit the benefit of reduced metal cost to be passed on to higher-volume applications. Equally, there is a need for the design and development of new alloys that are intrinsically low-cost and lend themselves to fabrication by novel cost-effective net shape processing. The approaches that might be used to select, design and process both conventional alloys and novel alloy systems will be reviewed, with a focus on innovation in design of low-cost alloys amenable to new processing paths and increasingly tolerant of variability in composition.

scholarly journals Resource-saving technologies for preparing fodder crops

2020 ◽  
Vol 27 ◽  
pp. 00106
Author(s):  
Tatiana Marinchenko
Keyword(s):  
Nutritional Value ◽  
Animal Husbandry ◽  
Resource Saving ◽  
Feed Processing ◽  
Processing Technologies ◽  
Feed Resources ◽  
Feed Production ◽  
Fodder Crops ◽  
The Cost ◽  
Unconventional Feed

A modern animal husbandry needs balanced feeding with rational use of feed and the maximum involvement of unconventional feed. At the same time, issues of increasing the nutritional value of feeds, improving quality, reducing the share of cereals remain urgent, since they occupy a significant part in the composition of the diet and cost structure. The application of modern feed processing technologies increases the efficiency of their use, increases the performance of animal husbandry, as evidenced by numerous experiments. The organization of feed production based on own feed resources significantly reduces the cost of production. The application of a number of technologies has been discussed and justified, which allows obtaining feed with high zootechnical and consumer characteristics, as well as with high rates of nutrition, digestibility and biological value with a significant reduction in the cost of feeding.

scholarly journals Constraints to utilization of improved processing technologies among cassava processors in Oyo State, Nigeria

2021 ◽  
Vol 7 (1) ◽  
pp. 41-49
Author(s):  
I.O. Ewebiyi ◽  
T.O. Ikotun ◽  
O.O. Olayemi
Keyword(s):  
Screw Press ◽  
Descriptive Statistics ◽  
Hammer Mill ◽  
Processing Technologies ◽  
Know How ◽  
Agricultural Engineering ◽  
Lack Of Information ◽  
Collecte De Données ◽  
The Cost ◽  
Structured Questionnaire

This study investigated the constraints associated with utilization of improved processing technologies among cassava processors in Oyo State, Nigeria. A structured questionnaire was used to collect data from a random sample of 176 respondents. Data was analyzed using descriptive statistics and Pearson Product Moment Correlation. The findings were that most (56.8%) of the respondents had a positive attitude towards utilization of mechanical grater, screw press hydraulic and Hammer mill technologies. However, inadequate funds, lack of technical know-how, lack of information, high cost of purchase and inadequate engineers for the improved processing technologies were identified as severe constraints militating against utilization of improved processing technologies. Significant relationship was established between these constraints and utilization of the improved processing technologies. It is recommended that government 1) builds factories that will lower the cost of the technologies; and 2) ensures that research institutes, departments of Agricultural engineering in universities and polytechnics and adult education programs in the community are adequately funded to promote knowledge of the technologies.RésuméCette étude a examiné les contraintes associées à l’usage des technologies traitantes améliorées parmi les traitants du manioc dans l’état d’Oyo au Nigeria. Un questionnaire structuré fut utilisé pour la collecte de données provenant de 176 enquêtés hasardement sélectionnés du champ d’étude. Les données ainsi collectées furent analysées par moyen de statistiques descriptives (telles que le comptage de fréquence, le pourcentage et la moyenne) ainsi que les statistiques inferentielles. La Corrélation du Moment Produit de Pearson (CMPP) fut employée pour déterminer la relation entre contraintes et usage des technologies traitantes améliorées parmi les traitants du manioc dans le champ d’étude. Les résultats de l’étude ont démontré que l’âge moyen d’enquêtés était de 41.23 ans et que plus d’un quart d’enquêtés (33.0%) avaient six à dix ans d’expérience dans le traitement du manioc. De surcroit, les résultats ont révélé que la plupart d’enquêtés (56.8%) avaient une attitude favorable envers l’usage des technologies traitantes améliorées de rappe mécanique, presse-vis hydraulique et moulin-marteau. Des fonds inadéquats, le manque du savoir-faire technique, le manque d’information, le coût élevé d’achat, et les ingénieurs inadéquats concernant les technologies traitantes améliorées ont été identifiés par les enquêtés comme sérieuses contraintes militant contre l’usage des technologies traitantes améliorées. Une relation significative existait aussi entre contraintes (r=-0.189, p=0.012) auxquelles les enquêtés font face et leur usage des technologies traitantes améliorées. L’étude a recommandé que le gouvernement construise les usines ou industries où les technologies traitantes améliorées seraient fabriquées à coût bas, que les instituts de recherche et département d’ingénierie agronome dans les universités et écoles polytechniques soient financés adéquatement, ainsi que les programmes d’alphabétisation d’adultes dans les communautés de traitants du manioc pour surmonter le défi d’analphabétisation et la saisie du savoir-faire technique concernant les opérations technologies. Tout ceci va renchérir l’usage effectif des technologies traitantes améliorées parmi les traitants du manioc dans le champ d’étude—une chose qui, en long terme, pourra se traduire en haute productivité, augmentation de revenus, et conditions de vie en mieux.

Validation of a low-cost selective powder deposition process through the characterization of tin bronze specimens

2021 ◽  
pp. 146442072110319
Author(s):  
Samuel Magalhães ◽  
Manuel Sardinha ◽  
Carlos Vicente ◽  
Marco Leite ◽  
Relógio Ribeiro ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Low Cost ◽  
Deposition Process ◽  
Metal Powders ◽  
Tin Bronze ◽  
Powder Deposition ◽  
Manufacturing Technologies ◽  
The Cost

Additive manufacturing technologies are becoming increasingly popular due to their advantages over traditional subtracting manufacturing technologies. Despite advances in this field, fixed and maintenance costs for additive manufacturing with metals remain high. The introduction of low-cost metal machines in the additive manufacturing market considerably reduces the cost of acquiring and maintaining this type of equipment. This work aims to establish the process requirements for a low-cost selective powder deposition process, and validate it through the production of specimens in the laboratory and evaluate their mechanical properties. Tin bronze specimens were produced under different manufacturing conditions, namely powder dimensions, type of crucible and coke, firing segments and casting strategy. The morphology and chemical composition of the specimens were carried out combining the scanning electron microscopy and energy dispersive X-Ray spectroscopy techniques, respectively. It was observed that crucibles and coke with impurities that react with the metal powders and infill in a reducing atmosphere have influence in the final quality of parts. Tested samples displayed high variability of results which can be correlated with different manufacturing conditions. The selection of the appropriate print parameters led to the manufacture of tin bronze specimens with mechanical properties comparable to those reported in the literature. Overall, low-cost selective powder deposition is a promising technology, if identified manufacturing issues are addressed.

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