Preparation and thermal shock properties of Si3N4-WC nanocomposites

Author

Tian, Chunyan ; Jiang, Hai

Author_Institution

Dept. of Mech. Eng., Hefei Univ., Hefei, China

fYear

2011

fDate

15-17 July 2011

Firstpage

1482

Lastpage

1486

Abstract

Si₃N₄-WC nanocomposites were fabricated by hot-pressing nano-sized Si₃N₄ powders and sub-micrometer WC powders. The effect of WC particles on mechanical properties and thermal shock properties of silicon nitride ceramics were analyzed and discussed. The addition of proper amount of WC particles can improve the flexural strength and the fracture toughness, the optimum amount was 8wt.% and 4wt.% respectively. Si₃N₄-WC nanocomposites showed both higher critical temperature difference and better resistance to crack propagation compared to those of the monolithic silicon nitride ceramic.

Keywords

bending strength; ceramics; fracture toughness; hot pressing; nanocomposites; nanofabrication; nanoparticles; particle reinforced composites; powder technology; silicon compounds; thermal shock; thermal stress cracking; tungsten compounds; Si₃N₄-WC; WC particle addition; crack propagation; critical temperature difference; flexural strength; fracture toughness; hot-pressing; mechanical properties; nanocomposites; nanosized powders; silicon nitride ceramics; submicrometer WC powders; thermal shock properties; Ceramics; Electric shock; Immune system; Nanocomposites; Optical wavelength conversion; Silicon; Thermal resistance; Si3N4; Thermal shock properties; WC; nanocomposites;

fLanguage

English

Publisher

ieee

Conference_Titel

Mechanic Automation and Control Engineering (MACE), 2011 Second International Conference on

Conference_Location

Hohhot

Print_ISBN

978-1-4244-9436-1

Type

conf

DOI

10.1109/MACE.2011.5987228

Filename

5987228