Spark plasma sintering of Al2O3-cBN composites facilitated by Ni nanoparticle precipitation on cBN powder by rotary chemical vapor deposition

被引：40

作者：

Zhang, Jianfeng ^{[1
]}

Tu, Rong ^{[1
]}

Goto, Takashi ^{[1
]}

机构：

[1] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2011年 / 31卷 / 12期

基金：

日本学术振兴会;

关键词：

Ni nanoparticle precipitated cBN (cBN/Ni); Spark plasma sintering (SPS); Phase transformation; Microstructure; C. Mechanical properties; CUBIC BORON-NITRIDE; PHASE-TRANSFORMATION; DENSIFICATION; AL; MICROSTRUCTURE; NANOCOMPOSITE; FABRICATION; MIXTURES; BEHAVIOR; HARDNESS;

D O I：

10.1016/j.jeurceramsoc.2011.05.019

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：

Al2O3-cBN/Ni composites were consolidated by spark plasma sintering (SPS) using alpha-Al2O3 and Ni nanoparticle precipitated cBN (cBN/Ni) powders. The Ni nanoparticles, 10-100 nm in diameter and 0.5-2.2 mass% in content, were precipitated on cBN powder by rotary chemical vapor deposition. The effect of sintering temperature (T-SPS) and Ni content (C-Ni) on the densification, phase transformation, microstructure and hardness of the Al2O3-cBN/Ni composites were investigated. The highest relative density of Al2O3-30 vol% cBN composite was 99% at T-SPS = 1573 K and C-Ni = 1.7 mass%. At T-SPS = 1673 K, the relative density decreased due to the phase transformation of cBN to hBN. The Vickers hardness of Al2O3-30 vol% cBN/Ni at T-SPS = 1573 K and C-Ni = 1.7 mass% showed the highest value of 27 GPa. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：2083 / 2087

页数：5

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