Combustion synthesis and tribological properties of SiALON-based ceramic composites

2010 ◽  
Vol 19 (3) ◽  
pp. 172-177 ◽  
Author(s):  
Y. S. Zhao ◽  
Y. Yang ◽  
J. T. Li ◽  
I. P. Borovinskaya ◽  
K. L. Smirnov
Keyword(s):  
Combustion Synthesis ◽  
Tribological Properties ◽  
Ceramic Composites

scholarly journals Investigation of graphite effect on the mechanical and tribological properties of Al 7075-SiC-graphite hybrid metal matrix composites

2020 ◽  
Vol 37 (1−2) ◽  
Author(s):  
SRIDHAR ATLA ◽  
Prasanna Lakshmi Kaujala
Keyword(s):  
Silicon Carbide ◽  
Powder Metallurgy ◽  
Tribological Properties ◽  
Metal Matrix ◽  
Ceramic Composites ◽  
Wear Behaviour ◽  
Wear Loss ◽  
Mechanical And Tribological Properties ◽  
Al 7075 ◽  
Pin On Disc

The aluminium metal matrix composite reinforced with ceramic material of Silicon carbide (SiC) has good mechanical properties. However, aluminium based ceramic composites require improvements in their lubrication and tribological properties. In this study an attempt is made in the development of a new material through powder metallurgy technique by the addition of Graphite, which acts as a solid lubricant. This work investigated the influence of graphite on the wear behaviour of Al 7075/SiC /X wt.% graphite(X=0, 5 and 10) hybrid composite. The investigation reveals the effectiveness of incorporation of graphite in the composite for gaining wear reduction. The Al 7075 (aluminium alloy 7075) reinforced with SiC –graphite were investigated. The composites were fabricated using powder metallurgy route. The microstructures, material combination, wear and friction properties were analysed by scanning electron microscopy, XRD, and pin-on-disc wear tester. The newly developed aluminium composite has significant improvements in tribological properties with a combination of 5% Silicon carbide (SiC) and 5% Graphite. The test reveals that sliding distance of 1000 m and sliding speed of 1.5 m/s with applied load of 5 N result in minimum wear loss of 0.01062g and coefficient of friction as 0.1278.

Effect of graphene platelets on tribological properties of boron carbide ceramic composites

2017 ◽  
Vol 65 ◽  
pp. 57-63 ◽  
Author(s):  
Richard Sedlák ◽  
Alexandra Kovalčíková ◽  
Ján Balko ◽  
Pawel Rutkowski ◽  
Aleksandra Dubiel ◽  
...  
Keyword(s):  
Boron Carbide ◽  
Tribological Properties ◽  
Ceramic Composites ◽  
Graphene Platelets

Fabrication of MgO/Graphene Composites by Combustion Synthesis and Spark Plasma Sintering

2018 ◽  
Vol 281 ◽  
pp. 125-130
Author(s):  
Nan Lu ◽  
Jia Xi Liu ◽  
Gang He ◽  
Jiang Tao Li
Keyword(s):  
Mechanical Properties ◽  
Combustion Synthesis ◽  
Spark Plasma Sintering ◽  
Sintering Temperature ◽  
Ceramic Composites ◽  
Combustion Reaction ◽  
Sintering Additive ◽  
Microstructure And Mechanical Properties ◽  
Plasma Sintering ◽  
Spark Plasma

MgO/Graphene ceramic composites were fabricated by combining combustion synthesis with spark plasma sintering. MgO/Graphene mixture powders were prepared by the combustion reaction between Mg powders and CO2 gas. Dense MgO/Graphene composites were fabricated by spark plasma sintering (SPS) using LiF as the sintering additive. The effect of the sintering temperature on microstructure and mechanical properties of the prepared MgO/Graphene ceramics was discussed. The sintering temperature of the MgO/Graphene mixture powders increased from 900°C to 1300°C. The highest density of 3.43g/cm3 and hardness of 2133MPa were obtained at 1100°C. Compared with monolithic MgO ceramics, the hardness of MgO/Graphene ceramics at the same sintering temperature was increased from 840MPa to 2133MPa.

Preparation of Al2O3–ZrO2–SiO2 ceramic composites by high-gravity combustion synthesis

2013 ◽  
Vol 41 ◽  
pp. 622-626 ◽  
Author(s):  
Guanghua Liu ◽  
Quansheng Wang ◽  
Jiangtao Li ◽  
Yixiang Chen ◽  
Bin He
Keyword(s):  
Combustion Synthesis ◽  
Ceramic Composites ◽  
High Gravity

Large Scale Al2O3-ZrO2 (Y2O3) Eutectic and Hypereutectic Achieved by Combustion Synthesis in High Gravity Field

2014 ◽  
Vol 602-603 ◽  
pp. 252-257
Author(s):  
Xiao Bo Lu ◽  
Hong Bo Liu ◽  
Yu Fei Zhang
Keyword(s):  
Fracture Toughness ◽  
Flexural Strength ◽  
Gravity Field ◽  
Combustion Synthesis ◽  
Ceramic Composites ◽  
High Fracture Toughness ◽  
High Gravity ◽  
Transformation Toughening ◽  
High Fracture ◽  
High Gravity Field

By introducing ZrO2 (4Y) powder into the thermit, the solidified Al2O3-ZrO2 (4Y) ceramic composites with eutectic and hypereutectic microstructures were prepared via combustion synthesis in high gravity field, and the microstructures and mechanical properties of the solidified ceramic composites were discussed. XRD, SEM and EDS showed that the Al2O3-33%ZrO2 (4Y) as the eutectic were composed of random-orientated rod-shaped colonies consisting of a triangular dispersion of orderly submicron-nanometer t-ZrO2 fibers, surrounded by inter-colony regions consisting of spherically-shaped micrometer t-ZrO2 grains, whereas Al2O3-45%ZrO2 (4Y) as the hypereutectic were comprised of spherically-shaped micron-meter t-ZrO2 grains, surround by irregularly-shaped α-Al2O3 grains and a few colonies. Compared to the directionally solidified Al2O3-ZrO2 (Y2O3), the increase in hardness and flexural strength of the eutectic obtained in current experiment was due to high densification, small-size defect and high fracture toughness induced by residual stress toughening and transformation toughening mechanisms; meanwhile, in despite of the moderate decrease in hardness, high flexural strength of the hypereutectic was considered to be a result of small-size defect and high fracture toughness induced by transformation toughening and microcrack toughening mechanisms.

Combustion synthesis of TiCxN1−x–TiB2 ceramic composites in a high-gravity field

2011 ◽  
Vol 46 (6) ◽  
pp. 958-961 ◽  
Author(s):  
Guanghua Liu ◽  
Jiangtao Li ◽  
Xiaoshan Ning ◽  
Yixiang Chen
Keyword(s):  
Gravity Field ◽  
Combustion Synthesis ◽  
Ceramic Composites ◽  
High Gravity ◽  
High Gravity Field

scholarly journals Microstructures and Toughening of TiC-TiB2Ceramic Composites with Cr-Based Alloy Phase Prepared by Combustion Synthesis in High-Gravity Field

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Xuegang Huang ◽  
Chun Yin ◽  
Zhongmin Zhao ◽  
Long Zhang ◽  
Junyan Wu
Keyword(s):  
Fracture Toughness ◽  
Gravity Field ◽  
Combustion Synthesis ◽  
Ceramic Composites ◽  
Crack Deflection ◽  
Full Density ◽  
High Gravity ◽  
Average Thickness ◽  
Pull Out ◽  
High Gravity Field

Micro-nanocrystalline microstructures which are characterized by TiB2platelets of the average thickness close to or smaller than 1 μm can be achieved in nearly full-density solidified TiC-TiB2ceramic composites with Cr-based alloy phases by combustion synthesis in ultra-high gravity field of 2500 g. The filler phases in ceramic composites are actually Cr-based alloy with a little solidified solution of Ni atoms and Al atoms. The hardness, flexural strength, and fracture toughness of the materials are 18.5 ± 1.5 GPa, 650 ± 35 MPa, and 16.5 ± 1.5 MPa⋅m0.5, respectively. The improved fracture toughness of TiC-TiB2ceramic composites results from crack deflection, crack bridging, and pull-out by a large number of fine TiB2platelets and plastic deformation with some Cr-based alloy phases.

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