Ti-Al-Nb Material for High-Temperature Applications: Combustion Synthesis from Oxide Raw Materials

2017 ◽  
Vol 746 ◽  
pp. 262-266
Author(s):  
D.E. Andreev ◽  
V.I. Yukhvid ◽  
Denis M. Ikornikov ◽  
Vladimir N. Sanin
Keyword(s):  
High Temperature ◽  
Combustion Synthesis ◽  
Raw Materials ◽  
High Gravity ◽  
Target Product ◽  
Oxide Materials ◽  
Centrifugal Shs ◽  
First Time ◽  
Metallic Impurities ◽  
Temperature Applications

This work is focused on preparation of Nb-doped Ti–Al material (Ti–29.3Al–17.6Nb wt %) by centrifugal SHS. Results of studying of combustion and synthesis regularities of intermetallic material on γ-TiAl base from oxide materials under high gravity are presented in the article. For the first time is used a reduction mixture on Al/Ca base which markedly increases the yield of Ti–Al–Nb and decreases the amount of non-metallic impurities (oxygen, nitrogen, carbon) in target product.

Sol-Gel Combustion Synthesis of Silica/ Carbon Black Pigment

2012 ◽  
Vol 554-556 ◽  
pp. 636-639
Author(s):  
Qi Fu Bao ◽  
Wei Xia Dong ◽  
Qi Bing Chang ◽  
Jian Er Zhou
Keyword(s):  
High Temperature ◽  
Carbon Black ◽  
Combustion Synthesis ◽  
Raw Materials ◽  
Sol Gel ◽  
Black Pigment ◽  
Prepared Sample ◽  
Gel Combustion ◽  
Combustion Technique

A green silicon-containing carbon black pigment was synthesized via a sol-geo combustion technique using TEOS and black ink as raw materials. The obtained black pigment was characterized by XRD, TEM and UV-vis absorption spectrophotometer. The results show that the silicon coated with carbon black pigment can be formed at pH ≥ 2 and the black pigment does not change its color after calcinations at 1300 °C in air implying the carbon black is coated completely with SiO2. When pH is 4, the properties of as-prepared sample are similar with the conventional high-temperature pigment. XRD and SEM further confirm that silicon coats with carbon black fully. The silica/ carbon black pigment may represent an opportunity for the applications in the decoration of the high-temperature ceramic.

Effect of mechanically activated raw materials on β-sialon formation by combustion synthesis

2007 ◽  
Vol 22 (10) ◽  
pp. 2863-2867 ◽  
Author(s):  
Ramasamy Sivakumar ◽  
Kazuhiko Aoyagi ◽  
Tomohiro Akiyama
Keyword(s):  
Mechanical Activation ◽  
Combustion Synthesis ◽  
Milling Time ◽  
Raw Materials ◽  
Raw Material ◽  
First Time

The influence of different raw material mixtures on β-sialon (Si6−zAlzOzN8−z, 1 ⩽ z ⩽ 4) formation through mechanical activation coupled combustion synthesis (MA-CS) was investigated in low nitriding atmosphere of 1 MPa without diluent inclusions. The MA-CS performed for the first time on sialon raw materials with milling time of 18 min obtained sialons more than three times as pure as those obtained by CS of mixtures ball milled to 1 h (z = 3). The starting materials containing silicon, aluminum, and alumina (z = 4) after MA-CS had an increment of sialon amounts up to 88 mass%.

Study on Combustion Synthesis and Densification Process for Titanium Diboride and Iron Layered Materials

2007 ◽  
Vol 546-549 ◽  
pp. 1401-1408
Author(s):  
Kun Wang ◽  
Jian Ping Liu ◽  
Zheng Yi Fu ◽  
Wei Min Wang ◽  
Hao Wang ◽  
...  
Keyword(s):  
High Temperature ◽  
Combustion Synthesis ◽  
Titanium Diboride ◽  
Raw Materials ◽  
Combustion Process ◽  
Layered Materials ◽  
Propagation Rate ◽  
Interfacial Bonding ◽  
Densification Process ◽  
Temperature Range

The combustion synthesis and densification process for titanium diboride and iron layered materials in the process of Self-propagating high-temperature synthesis of titanium diboride, variation of the initial temperature, amount of diluent and particle size of raw materials had effect on the adiabatic temperature, fraction of melted product and propagation rate of the combustion process, were studied by theoretical calculation and experimental analysis. The result showed that divided by a combustion temperature 3050K, either in the high temperature range or in the low temperature range, the calculated process activation energies were 140 KJ/mol or 355 KJ/mol respectively, which revealed two different reaction process mechanisms. Interfacial bonding between TiB2+Fe cermet and Fe substrate was analyzed by EPMA, which showed interfacial bonding of two-layered product was obtained by the dissolution and the diffusion of Ti in the Fe substrate and joining of Fe binder with Fe substrate. The fractures of joints took place in the TiB2+Fe cermet layer rather than at the interface.

Preparation of Li3V2(PO4)3/C Cathode Material Enhance Performance for Lithium Ion Batteries

2012 ◽  
Vol 550-553 ◽  
pp. 2055-2058
Author(s):  
Zhe Wang ◽  
Yan Li Ruan ◽  
Ping Ping Qi ◽  
Meng Liang Qian
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Carbon Source ◽  
Raw Materials ◽  
Lithium Ion ◽  
Lithium Vanadium Phosphate ◽  
Phase Reaction ◽  
Vanadium Phosphate ◽  
Flow Phase ◽  
First Time

Due to the high stability and potential characteristics to the economical and environmental, the Li3V2(PO4)3increased the global concern on the polyanionic materials. In this work, we using Li2CO3, V2O5, NH4H2PO4 and PEG as raw materials to compared the flow phase reaction and high temperature solid state synthesis of lithium vanadium phosphate composites. The results of this study can be considered in making decision which conditions of achieved precipitation of carbon source can be efficiently applied in a real Electrochemical performance manufactory. The obtained results indicated that using Glucose as carbon source, and calcined at 800 °C, 0.1C rate current conditions, high temperature solid state sintering of lithium vanadium phosphate composites for the first time following a discharge capacity of 119.31mAh/g, which has a good reusability performance.

scholarly journals A Review on the Wear, Corrosion and High-Temperature Resistant Properties of Wire Arc-Sprayed Fe-Based Coatings

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2527
Author(s):  
Joseph Ndiithi Ndumia ◽  
Min Kang ◽  
Bertrand Vigninou Gbenontin ◽  
Jinran Lin ◽  
Samuel Mbugua Nyambura
Keyword(s):  
High Temperature ◽  
Wear Behavior ◽  
Raw Materials ◽  
Deposition Efficiency ◽  
Production Costs ◽  
Alloying Elements ◽  
Arc Spraying ◽  
Coating Materials ◽  
Cored Wire ◽  
Temperature Applications

Among different thermal spraying methods, arc-spraying has been widely used due to its low operating costs and high deposition efficiency. The rapid progress of cored wire technology in arc-spraying has increased possibilities for the preparation of new Fe-based coating materials with enhanced properties by adding reinforcement particles and alloying elements to suit the different applications. Fe-based coatings have been extensively used because of their high strength, toughness, lower production costs, and availability of raw materials. This makes them suitable replacements for Ni-based coatings in ambient and high-temperature applications. This review discusses the research status and developments of the arc-sprayed Fe-based coatings. The study specifically reviews the wear behavior, corrosion analysis, and high-temperature resistant properties of arc-sprayed Fe-based coatings, aiming to develop an understanding of the protection mechanisms for Fe-based coatings. The performance of the Fe-based coatings depends on the integrity of the coating structure. Optimizing arc-spraying parameters minimizes defects (pores, grain boundaries, unmelted particles, oxides, and microcracks) that deteriorate the coating properties. High amorphous phase content, ceramic reinforcement particles and alloying elements enhance the corrosion, tribological, and high-temperature resistant properties of Fe-based coatings. In high-temperature applications, Fe-based coatings form oxide scales that protect the coating from further oxidation; thus, it is important to select the optimum composition for the alloying elements.

Microstructural characterization of a rapidly solidified Al-Fe-V-Si alloy for elevated temperature applications

1988 ◽  
Vol 46 ◽  
pp. 550-551
Author(s):  
R. E. Franck ◽  
J. A. Hawk ◽  
G. J. Shiflet
Keyword(s):  
High Temperature ◽  
Elevated Temperature ◽  
Grain Growth ◽  
Volume Fraction ◽  
Microstructural Characterization ◽  
Second Phase ◽  
Microstructural Stability ◽  
Elevated Temperature Strength ◽  
Temperature Applications

Rapid solidification processing (RSP) is one method of producing high strength aluminum alloys for elevated temperature applications. Allied-Signal, Inc. has produced an Al-12.4 Fe-1.2 V-2.3 Si (composition in wt pct) alloy which possesses good microstructural stability up to 425°C. This alloy contains a high volume fraction (37 v/o) of fine nearly spherical, α-Al12(Fe, V)3Si dispersoids. The improved elevated temperature strength and stability of this alloy is due to the slower dispersoid coarsening rate of the silicide particles. Additionally, the high v/o of second phase particles should inhibit recrystallization and grain growth, and thus reduce any loss in strength due to long term, high temperature annealing.The focus of this research is to investigate microstructural changes induced by long term, high temperature static annealing heat-treatments. Annealing treatments for up to 1000 hours were carried out on this alloy at 500°C, 550°C and 600°C. Particle coarsening and/or recrystallization and grain growth would be accelerated in these temperature regimes.

ON THE PROCESSING OF HEMATITE RAW MATERIALS AT THE KRYVOROZHSK MINING AND PROCESSING PLANT OF OXIDIZED ORE ON TECHNOLOGY OF DIRECT RECOVERY ITmk3

2018 ◽  
pp. 32-37
Author(s):  
P.I. Loboda ◽  
Younes Razaz ◽  
S. Grishchenko
Keyword(s):  
Magnetic Properties ◽  
Cast Iron ◽  
Iron Content ◽  
Raw Materials ◽  
Direct Reduction ◽  
Processing Plant ◽  
High Iron Content ◽  
High Iron ◽  
Direct Restoration ◽  
First Time

Purpose. To substantiate the efficiency of processing hematite raw materials at the Krivoy Rog Mining and Processing Plant of Oxidized Ores using the direct reduction technology itmk3®. Metodology. Analysis of the results of the itmk3® direct restoration technology developed by Kobe Steel Ltd., Japan and Hares Engineering GmbX, Austria, with a view to using it to process Krivbass hematite ores into granulated iron (so-called “nuggets”). Findings. The involvement in the production of hematite ores (oxidized quartzite) of Krivbass with high iron content, but with low magnetic properties for their processing into granular cast iron is grounded. Originality. The use of itmk3® direct reduction technology from Kobe Steel Ltd., Japan and Hares Engineering GmbH, Austria for the processing of Krivbass hematite ores into granular cast iron is justified for the first time. Practical value. The efficiency of the use of hematite ores (oxidized quartzite) has been substantiated, which can significantly reduce the costs in the mining cycle for the economical production of metallurgical products.

PERSPECTIVE DEVELOPMENT OF WORLD PRODUCTION OF FEEDS FOR AQUACULTURE: ALTERNATIVE SOURCES OF RAW MATERIALS

2017 ◽  
pp. 67-78
Author(s):  
Lina Yurievna Lagutkina
Keyword(s):  
Raw Materials ◽  
Limiting Factors ◽  
Current Status ◽  
Feed Production ◽  
The World ◽  
Market Trends ◽  
Alternative Sources ◽  
World Industry ◽  
First Time ◽  
A Current

The author of the article discloses the prospects of development of the world feed production for aquaculture based on the analysis of key innovative technological and market trends. The author specifies that shortage, high cost, low ecological compatibility of traditional raw materials - fish flour - are among major limiting factors in the development of production of feeds for aquaculture. This fact, in turn, limits sustainable development of aquaculture both in Russia, and in the world in general. The article presents the overview of a current status of the world industry of feed production in aquaculture, where the regional situation is studied, as well. For the first time, there is given the outlook of innovative technologies in feed production based on the alternative sources of protein (on the example of projects of leading aquabiotechnological companies) which will determine industry’s objectives for the mid-term perspective.

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