Volume 33, Issue 2 (Journal of Advanced Materials-fall 2015)
2015, 33(2): 85-97 |
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M. Mashhadi, A. Abdollahi, Z. Nasiri. Investigation of Molybdenum Disilicide, Boron Carbide and Silicon Carbide Particles on Flexural Strength and Pressureless Sintering Behavior of ZrB2-HfB2 Ultra High Temperature Composite. Journal of Advanced Materials in Engineering (Esteghlal) 2015; 33 (2) :85-97
URL: http://jame.iut.ac.ir/article-1-582-en.html
URL: http://jame.iut.ac.ir/article-1-582-en.html
, alirezaabdollahi1366@gmail.com
Abstract: (8775 Views)
In this study, ZrB2-HfB2 composite was produced by pressureless sintering method. MoSi2 B4C and SiC particles were used as reinforcement. ZrB2 powder was milled in planetary ball mill apparatus and then reinforcement particles were added to the milled powder. The composite powders were then CIPed and sintered at 2100oC and 2150oC. Scanning electron microscopy (SEM) with an energy dispersive X-ray spectrometer (EDS), flexural test, and resonance frequency method were used to compare the added particle effects on mechanical properties and pressureless sintering behavior of ZrB2-HfB2 composite. The analysis showed that the ZrB2-HfB2-MoSi2-SiCnano composite displays the largest gain in flexural strength. Furthermore, increasing the sintering temperature leads to an increase in flexural strength of samples.
Keywords: ZrB2-HfB2 composite, Ultra high temperature ceramics, Flexural strength, Pressureless sintering
Type of Study: Research |
Subject:
General
Received: 2015/02/25 | Accepted: 2015/02/25 | Published: 2015/02/25
Received: 2015/02/25 | Accepted: 2015/02/25 | Published: 2015/02/25
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