Development of matrix microstructure in polycrystalline cubic boron nitride ceramics

被引：8

作者：

Lindgren, K. E. ^{[1
]}

Kauppi, A. ^{[2
]}

Falk, L. K. L. ^{[1
]}

机构：

[1] Chalmers, Dept Phys, SE-41296 Gothenburg, Sweden

[2] Sandvik Coromant, SE-12680 Stockholm, Sweden

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2017年 / 37卷 / 09期

关键词：

PCBN; Titanium oxide nitride carbide; WC-Co cemented carbide milling media; Cermet milling media; Microstructure; CBN-TIN;

D O I：

10.1016/j.jeurceramsoc.2017.03.010

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：

The development of matrix microstructure in polycrystalline cubic boron nitride cutting tool materials has been investigated by X-ray diffraction and scanning and transmission electron microscopy combined with energy dispersive X-ray spectrometry. The materials had a matrix based on Ti(C,O,N) and Al and were fabricated from powder mixtures milled with either WC-Co cemented carbide or (Ti,W)(C,N)-Co cermet milling media. The introduction of WC-Co debris resulted in the formation of an Al- and W rich liquid phase during high pressure high temperature sintering. Crystalline intergranular phases rich in W partitioned from this liquid. Debris from the cermet milling media resulted in the formation of intergranular Co2B; the W was retained in the (Ti,W)(C,N) structure during sintering. Al-rich reaction zones on cBN grain surfaces developed locally during high pressure high temperature sintering. (C) 2017 Elsevier Ltd. All rights reserved.

引用

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页码：3017 / 3026

页数：10

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