Original Article:
Elaboration of ZrC-SiC composites by spark plasma sintering using polymer-derived ceramics
Romain Lucas, et al.
Ceramics International, 2014, 40, 10, 15703-15709.
10.1016/j.ceramint.2014.07.093
Ceramics based on Group 4 transition metal carbides are very hard, typically 20-30 GPa, and have high melting points, making them candidates for high-temperature applications. In this work, polycarbomethylsilane (PCMS) was used as SiC precursor for the preparation of ZrC-SiC composites by spark plasma sintering (SPS) method. It was shown that the addition of SiC increased the elastic modulus and hardness, reaching a maximum at 20 wt.% SiC.
The whole process is shown in the figure, including:
The first step is to cross-link PCMS by heating at 523 K in air for 10 h to give PCMSc.
The ceramic yield of the crosslinked polymer was 55%, and then mixed with ZrC powder to obtain ZrC-SiC mixtures with different contents of SiC. Pyrolyze the mixture at 873 K for 5 h under argon (step ii).
Before the final step (iv) of SPS, the obtained residue was ball milled (step iii) to obtain ZrC-PCMScpb powder (cpb was used for crosslinking/pyrolysis/ball milling).
Chemicals Related in the Paper:
| Catalog Number | Product Name | Structure | CAS Number | Price |
|---|---|---|---|---|
| ACM62306278 | POLYCARBOMETHYLSILANE |  |
62306-27-8 | Price |
