scholarly journals Taguchi Optimization of Fracture Toughness of Silicon Carbide Extracted From Agricultural Wastes

2021 ◽  
Author(s):  
Amit Kumar Thakur ◽  
Ajay Kumar Kaviti ◽  
Mohd Tariq Siddiqi ◽  
J. Ronald Aseer ◽  
Rajesh Singh ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Silicon Carbide ◽  
Process Parameters ◽  
Heating Temperature ◽  
Optimization Technique ◽  
High Hardness ◽  
Agricultural Wastes ◽  
Optimum Process ◽  
Sintering Process ◽  
Taguchi Optimization

Abstract In India, agricultural wastes such as palm ash and rice husk, which are abundant which have a high potential for usage as usable renewable energy and silica. Silicon carbide (SiC) is utilized for various applications due to its high hardness, compressive strength, and good wear resistance. In this work, a cleaner and green methodology was adopted to produce SiC from various agricultural wastes like peanut shells, rice husks, sugar cane extracts, and corn cob. Pyrolysis experiments were carried out by varying parameters such as heating temperature (600 to 800 0C), heating time (160 to 180 min), and quantity of waste (450 to 550 g) to convert agricultural wastes into powder SiC. X-ray diffraction, Raman, Fourier transform infrared spectroscopy and Scanning electron microscope confirms the formation of SiC phase in SiC. The sintering process parameters such as heating rate (5 to 150C/min), cooling rate (5 to 150C/min), and pressure (60 to 80 MPa) were selected for finding fracture toughness of sintered SiC. The process parameters for the pyrolysis and sintering process were optimized by the Taguchi optimization technique. Confirmations tests were conducted with optimum process parameters and the results indicated that confirmations results are correlated with predicted results.

Taguchi Optimization of Fracture Toughness of Silicon Carbide Extracted from Agricultural Wastes

Silicon ◽  
2022 ◽  
Author(s):  
Amit Kumar Thakur ◽  
Ajay Kumar Kaviti ◽  
Mohd Tariq Siddiqi ◽  
J. Ronald Aseer ◽  
Rajesh Singh ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Silicon Carbide ◽  
Agricultural Wastes ◽  
Taguchi Optimization

Corrosion Resistance of TiN Imitation Gold Decoration Coatings on Golden-Pen Components

2012 ◽  
Vol 501 ◽  
pp. 355-359
Author(s):  
Jun Ying Hou ◽  
Zhi Wei Zhou
Keyword(s):  
Corrosion Resistance ◽  
Process Parameters ◽  
High Hardness ◽  
Optimum Process ◽  
Gold Plating ◽  
Surface Corrosion ◽  
Chromium Plating ◽  
Tin Coatings ◽  
Plating Method ◽  
Multi Phase

Experiments were carried out with different process parameters to investigate the effects of used parameters on corrosion resistance of TiN coatings obtained. In experiments, TiN imitation gold decoration coatings were prepared on 1Cr13 pen-point and brass chromium plating pen-coil by multi-arc ion plating method. The phase composition of TiN coatings was measured by x-ray diffraction. The corrosion resistance of TiN coatings was tested by salt-mist and artificial-sweat experiments. The relationship between corrosion resistance of coatings and process parameters were analyzed. Therefore, the optimum process parameters were achieved suitable for plating coatings on substrates of 1Cr13 pen-point and brass chromium plating pen-coil with good imitation gold. Imitation gold plating layers obtained have good gloss, corrosion resistance, high hardness, wear resistance, and easy to maintain. The results showed that the corrosion resistance of coatings is more easily influenced by changes of PN2 and Vbom than that of matrix-bias voltage. The TiN coatings are of resistant to corrosion no matter they are in single or multi phase structure. The optimum parameters of achieving good corrosion resistance of TiN coatings are PN2=0.48Pa, Vbom=400V，bias=-20V. Under the optimum conditions, the obtained surface corrosion resistance state of the coatings can reach at least eight grades, even above ten grades.

On the effect of process parameters on properties of AlSi10Mg parts produced by DMLS

2014 ◽  
Vol 20 (6) ◽  
pp. 449-458 ◽  
Author(s):  
Manickavasagam Krishnan ◽  
Eleonora Atzeni ◽  
Riccardo Canali ◽  
Flaviana Calignano ◽  
Diego Manfredi ◽  
...  
Keyword(s):  
Process Parameters ◽  
Deep Understanding ◽  
Close Correlation ◽  
Process Window ◽  
Optimum Process ◽  
Sintering Process ◽  
Content Type ◽  
Significant Process ◽  
Macroscopic Properties ◽  
Full Factorial

Purpose – The aim of this research is to reach a deep understanding on the effect of the process parameters of Direct Metal Laser Sintering process (DMLS) on macroscopic properties (hardness and density) of AlSi10Mg parts and resulting microstructure. Design/methodology/approach – A full factorial design of experiment (DOE) was applied to determine the most significant process parameter influencing macroscopic properties of AlSi10Mg parts manufactured by DMLS process. The analysis aims to define the optimum process parameters and deduce the process window that provides better macroscopic properties of AlSi10Mg parts. Optical microscopy observations are carried out to link the microstructure to macroscopic properties. Findings – Macroscopic properties of DMLS parts are influenced by the change in process parameters. There is a close correlation between the geometry of scan tracks and macroscopic properties of AlSi10Mg parts manufactured by DMLS process. Originality/value – The knowledge of utilizing optimized process parameters is important to fabricate DMLS parts with better mechanical properties. The present research based on applying experimental design is the first analysis for AlSi10Mg parts produced in DMLS process.

scholarly journals Taguchi’s method of optimization of fracture toughness parameters of Al-SiCp composite using compact tension specimens

2021 ◽  
Vol 11 (2) ◽  
pp. 152-157
Author(s):  
Hareesha Guddhur ◽  
Chikkanna Naganna ◽  
Saleemsab Doddamani
Keyword(s):  
Fracture Toughness ◽  
Silicon Carbide ◽  
Grain Size ◽  
Process Parameters ◽  
Particulate Composite ◽  
Compact Tension ◽  
Stir Casting ◽  
Casting Technique ◽  
Silicon Carbide Particulate ◽  
Taguchi’S Design Of Experiments

The objective of this work is to investigate the process parameters which influence the fracture toughness of aluminum-silicon carbide particulate composite prepared using the stir casting technique. The Taguchi’s design of experiments is conducted to analyze the process parameters. Three parameters considered are composition of material, grain size and a/W ratio. From the Taguchi’s analysis, on compact tension specimens, aluminum 6061 reinforced with 9 wt% of the silicon carbide particles composite and a/W ratio of 0.45 are considered to be optimized parameters. Taguchi's technique result shows that the increment in the a/W ratio causes decrement in the load carrying capacity of the composite. Whereas the fine grain size of silicon carbide have better toughness values. From the ANOVA outcomes it is clear that the composition and a/W ratio of the geometry has more influence on the fracture toughness than the grain size of reinforcement.

scholarly journals Silicon carbide nanocomposites reinforced with disordered graphitic carbon formed in situ through oxidation of Ti3C2 MXene during sintering

2021 ◽  
Vol 21 (3) ◽  
Author(s):  
M. Petrus ◽  
J. Woźniak ◽  
T. Cygan ◽  
A. Lachowski ◽  
A. Rozmysłowska-Wojciechowska ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Silicon Carbide ◽  
Reference Sample ◽  
Powder Metallurgy Technique ◽  
Sintering Process ◽  
Plasma Sintering ◽  
Transmission Electron ◽  
Spark Plasma ◽  
Sintering Method

AbstractThis article describes the manufacturing of silicon carbide composites with the addition of quasi-two-dimensional titanium carbide Ti3C2, known as MXene. The composites were obtained by the powder metallurgy technique, consolidated with the use of the Spark Plasma Sintering method at 1900 °C and dwelled for 30 min. The influence of the Ti3C2 MXene addition on the microstructure and mechanical properties of the composites was investigated. The structure of the MXene phase after the sintering process was also analyzed. The results showed a significant increase (almost 50%) of fracture toughness for composites with the addition of 0.2 wt% Ti3C2 MXene. In turn, the highest hardness, 23.2 GPa, was noted for the composite with the addition of the 1.5 wt% Ti3C2 MXene phase. This was an increase of over 10% in comparison to the reference sample. The analysis of chemical composition and observations using a transmission electron microscope showed that the Ti3C2 MXene phase oxidizes during sintering, resulting in the formation of crystalline, highly defected, disordered graphite structures. The presence of these structures in the microstructure, similarly to graphene, significantly affects the hardness and fracture toughness of silicon carbide.

scholarly journals Development of a WC-based cemented carbide using stainless steel as binder and titanium carbide

2021 ◽  
Author(s):  
Sara Fidelis Silva ◽  
Michel Picanço Oliveira ◽  
Márcia Giardinieri de Azevedo ◽  
Bárbara Ferreira de Oliveira
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
High Hardness ◽  
Hardness Test ◽  
Global Market ◽  
Cemented Carbides ◽  
Sintering Process ◽  
Hardness Tests ◽  
Different Temperatures ◽  
Spark Plasma

Cemented carbides belong to the most common and most important cutting tool materials, representing about half of the global market. To date, cemented carbides of the WC-Co system are preferred because they have an excellent combination of hardness, wear resistance and fracture toughness. However, substitutes for cobalt have been researched due to its toxicity, shortage and high cost. Promising results have shown that it is possible to achieve properties like the cemented carbides of the WC-Co system using stainless steels. In view of this, in this work a cemented carbides will be produced using WC, stainless steel, TiC and C. The addition of TiC is intended to inhibit the growth of grains at high temperatures, while C will be added to suppress the lack of carbon it takes to the formation of phases η. Samples will be manufactured using the spark plasma pulsed sintering process at different temperatures. From Archimedes' principle, the density of the samples and the densification promoted by each sintering temperature will be determined. Vickers microhardness and hardness tests will be carried out. Through indentation of the Vickers hardness test, the lengths of the cracks formed will be measured to determine the fracture toughness. It is expected, from this combination of components of the system, to produce a cemented carbides with high hardness, toughness and densification. The results of this work will be compared with data found in the literature to verify the feasibility of its use.

scholarly journals Preparation of Sintered Brick with Aluminum Dross and Optimization of Process Parameters

Coatings ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1039
Author(s):  
Yu Zhang ◽  
Hongjun Ni ◽  
Shuaishuai Lv ◽  
Xingxing Wang ◽  
Songyuan Li ◽  
...  
Keyword(s):  
Process Parameters ◽  
Raw Materials ◽  
Raw Material ◽  
Molding Pressure ◽  
Optimum Process ◽  
Sintering Process ◽  
Aluminum Dross ◽  
Optimization Of Process Parameters ◽  
Protection Method ◽  
Engineering Soil

Aluminum dross is produced in the process of industrial production and regeneration of aluminum. Currently, the main way to deal with aluminum dross is stacking and landfilling, which aggravates environmental pollution and resource waste. In order to find a green and environmental protection method for the comprehensive utilization, the aluminum dross was used as raw materials to prepare sintered brick. Firstly, the raw material ratio, molding pressure and sintering process were determined by single factor test and orthogonal test, and the mechanism of obvious change of mechanical strength of sintered brick was studied by XRD and SEM. The experimental results show that, the optimal formula of sintered brick is 50% aluminum dross, 37.50% engineering soil and 12.50% coal gangue. The optimum process parameters are molding pressure 10 MPa, heating rate 8 °C/ min, sintering temperature 800 °C, holding time 60 min. The samples prepared under the above formula and process parameters present outstanding performance, and the compressive strength, flexural strength and water absorption rate are 16.21 MPa, 3.42 MPa and 17.12% respectively.

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