Synthesis and spark plasma sintering of the α-Si3N4 nanopowder

被引：6
|
作者：
Khajelakzay, Mohammad [1 ]
Bakhshi, Saeed Reza [1 ]
Borhani, Gholam Hossein [1 ]
Ramazani, Mazaher [1 ]
机构：
[1] Malek Ashtar Univ, Dept Mat Sci & Engn, Esfahan, Iran
来源：
CERAMICS INTERNATIONAL | 2016年 / 42卷 / 13期
关键词：
Silicon nitride; Two-step method; Nitridation; Mechanical alloying; Spark plasma sintering; SILICON-NITRIDE; MECHANICAL-PROPERTIES; PHASE-TRANSFORMATION; SI POWDERS; SI3N4; NANOWIRES; CERAMICS;
D O I：
10.1016/j.ceramint.2016.06.123
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A two-step process (milling and then heat treatment) was used for the preparation of alpha-Si3N4 nano powder. The influence of the milling time and heat treatment temperature as processing parameters were investigated on the formation of alpha-Si3N4. Silicon nitride ceramic was produced by spark plasma sintering at 1700 degrees C for 15 min, using MgSiN4 additive. The optimum sample was produced in a 30 h milling time, heat treatment at 1300 degrees C, and a 22 degrees C/min heating rate conditions. X-ray fluorescence analysis showed that the purity of the final product is above 98%. Nanoindentation hardness and Young's modulus of the SPS-ed sample were measured as 17 2.0 GPa and 290 +/- 11.0 GPa, respectively. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码：14867 / 14872
页数：6
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