Thermal Conductivity and Wear Resistance of A359/(SiC + Si3N4) Hybrid Composites Prepared by Squeeze Casting
- 51 Downloads
Thermal parameters and wear are considered with dry sliding for hybrid composites based on an A359 matrix prepared by squeeze casting. Composites are strengthened with addition of 5, 10, and 15 wt.% (SiC + Si3N4). Wear of A359/(SiC + Si3N4) composites proceeds under a load in the range 20 – 60 N with a sliding rate of 2.75 m/sec. It is found that A359/(SiC + Si3N4) composite exhibits relatively low thermal conductivity and better wear resistance than alloy A359. Friction coefficients and surface contact temperature for specimens of composite A359/(SiC + Si3N4) increase as there is an increase in (SiC + Si3N4) content within them. In studying worn surfaces it is detected that A359/(SiC + Si3N4) composite is covered with iron oxide that plays the role of a self-lubricating layer. The better wear resistance index for A359/(SiC + Si3N4) composites makes it possible to use them in the automobile industry.
Keywordsdry strengthening addition thermal conductivity wear friction coefficient
The authors thank the Russian Federation Ministry of Education and Science for financial aid in the framework of Increase Competitiveness Program of NITU MISiS.
- 37.N. Mathan Kumar, S. Senthil Kumaran, and L. A. Kumaraswamidhas, “An investigation of mechanical properties and material removal rate, tool wear rate in EDM machining process of Al2618 alloy reinforced with Si3N4, AlN and ZrB2 composites,” J. Alloys Compd., 650, 318 – 327 (2015).CrossRefGoogle Scholar
- 42.M. M. Schwartz, Composite Materials. Volume II: Processing, Fabrication and Applications, ASM International (1997).Google Scholar
- 43.M. T. Abou El-Khair, A. Daoud, and A. N. Abdel, “Effect of casting technology on the wear behaviour of A356 Al–Al2O3 or ZrO2 composites,” 4th Arab Cast Conference (2002).Google Scholar
- 44.A. Daoud, M. T. Abou El-Khair, and A. N. Abdel Azim, “Microstructure and wear behavior of squeeze cast 7075 Al–Al2O3 particle composites,”14th International Offshore and Polar Engineering Conference (2004).Google Scholar
- 46.A. Eucken, “Heat transfer in ceramic refractory materials: calculation from thermal conductivities of constituents,” Fortchg. Gebiete Ingenieurw. B. Forschungsheft, 16, 353 – 360 (1932).Google Scholar