Total views : 214

Experimental Analysis of Hardness and Densification of Microwave Sintered AL/SIC/AL2O3/Flyash Composites

Affiliations

  • Department of Mechanical Engineering, Sri Sairam Engineering College, Chennai - 600044, Tamil Nadu, India
  • R and D Department, Sri Sairam Engineering College, Chennai - 600044, Tamil Nadu, India
  • Department of Mechanical Engineering, B.M.S. College of Engineering, Bangalore - 560019, Karnataka, India

Abstract


Objectives: Powder metallurgy is one of the best methods to achieve uniform distribution of reinforcement in matrix. In the present study, silicon carbide, alumina and fly ash are reinforced in Aluminium matrix at various proportions through powder metallurgical process using both conventional and microwave sintering and the mechanical properties were evaluated. Methods/Statistical Analysis: The compaction load has varied from 4000 kg to 8000 kg, and it was observed that the maximum densification of 84.04% at 8000 kg was obtained. All the samples were prepared at 8000 kg load and sintering was done using microwave furnace. For comparison purpose, all the samples were sintered conventionally using tubular furnace. Findings: Hardness and densification tests were conducted on both conventional and microwave sintered specimens. Composites, which are, processed through microwave sintering shows a better result than conventionally sintered specimens with saving the process timing and power consumption. It is being observed that the role of SiC in microwave sintering is very vital as it is an absorber of microwaves. Application/Improvements: The working area of a microwave furnace is very less and it restricts the size of the working sample. The role of other absorbers (semiconductors) of microwaves can be studied.

Keywords

Densification, Hardness, Microwaves, Powder Metallurgy, Sintering.

Full Text:

 |  (PDF views: 238)

References


  • Chang I, Zhao Y. Advances in powder metallurgy properties, processing and application,1 st (edn.), Wood Head Publishing: Swaston, Cambridge; 2013. p. 624.
  • Chatterjee A, Basak T, Ayappa KG. Analysis of microwave sintering of ceramics. AICHE Journal. 1998; 44(10):2302–11.
  • Agrawal D. Microwave sintering, brazing and melting of metallic materials. Advanced Processing of Metals and Materials. 2006; 4:183–92.
  • Anklekar RM, Agrawal DK, Roy R. Microwave sintering and mechanical properties of P/M copper steel. Powder Metallurgy. 2001; 44(4):355–62.
  • Thostenson ET, Chou TW. Microwave processing: Fundamentals and applications in composites. Composites Part-A: Applied Science and Manufacturing. 1999; 30(9):1055–71.
  • Guo RQ, Rohatgi PK. Preparation of aluminium–fly ash particulate composite by powder metallurgy technique. Journal of Materials Science. 1997; 32(15):3971–4.
  • Umanath K, Selvamani ST, Palanikumar K. Friction and wear behaviour of Al6061 Alloy (SiC+Al2O3) hybrid composites. International Journal of Engineering Science and Technology. 2011; 3(7):5441–51.
  • Leparoux S, Vaucher S, Beffort O. Influence of SiC particle size on microwave sintering of metal matrix composites. 39, CH-3602 Thurn; 2002. p.13–18.
  • Rajkumar K, Aravindan S. Microwave sintering of copper–graphite composites. Journal of Materials Processing Technology. 2009; 209(15–16):5601–5.
  • Rajkumar K, Aravindan S. Tribological performance of microwave sintered copper–TiC–graphite hybrid composites. Tribology International. 2011; 44(4):347–58.
  • Brosnan KH, Messing GL, Agarwal DK. Microwave sintering of alumina at 2.45 GHz. Journal of the American Ceramic Society. 2003; 86(8):1307–12.
  • Cheng J, Agrawal D, Roy R, Jayan PS. Continuous microwave sintering of alumina abrasive grits. Journal of Materials Processing Technology. 2000; 108(1):26–9.
  • Yoshikawa N. Fundamentals and applications of microwave heating of metals. Journal of Microwave power and Electromagnetic Energy. 2010; 44(1):4–13.
  • Charles S, Arunachalam VP. Property analysis and mathematical properties of aluminium alloy hybrid (Al- alloy/SiC/flyash) composites produced by liquid metallurgy and powder metallurgy techniques. Indian Journal of Engineering and Materials Sciences. 2004; 11:473–80.
  • Mahajan G, Karve N, Patil U, Kuppan P, Venkatesan K. Analysis of microstructure, hardness and wear of Al-SiC-TiB2 hybrid metal matrix composite. Indian Journal of Science and Technology. 2015; 8(S2):101–05.

Refbacks

  • There are currently no refbacks.


Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.