Detailed microstructure of a cBN based cutting tool material

被引：53
作者：
Angseryd, J. [1 ,2 ]
Elfwing, M. [2 ]
Olsson, E. [1 ]
Andren, H. -O. [1 ]
机构：
[1] Chalmers, Dept Appl Phys Microscopy & Microanal, S-41296 Gothenburg, Sweden
[2] Sandvik Tooling AB, R&D Mat Invest, Stockholm, Sweden
来源：
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2009年 / 27卷 / 02期
关键词：
cBN; Microstructure; SEM; TEM; EFTEM; HIGH-PRESSURE; THERMO-CALC; TEMPERATURE; COMPOSITES; AL;
D O I：
10.1016/j.ijrmhm.2008.09.008
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure of a commercial polycrystalline cubic boron nitride (PCBN) tool material was studied using scanning electron microscopy with energy-dispersive X-ray analysis and transmission electron microscopy with electron energy loss spectroscopy and energy filtered TEM. These results were compared with results from X-ray diffraction and thermodynamic calculations. It is shown that this PCBN material consists of cBN both as micro metre-sized and nanometre-sized grains. The micrometre-sized grains show primarily straight phase boundaries and little reaction with the surrounding matrix. The matrix consists of mainly TiCN, with grains ranging from nanometres to sub-micrometres. The C and N content in TiCN varies, indicating a system far from equilibrium. Only small reaction zones are found and the major reaction is the one between Al and O, forming Al(2)O(3). It is also shown that it is possible to prepare samples thin enough for TEM/EFTEM/EELS studies, enabling the study of minor reaction phases like TiB(2). (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：249 / 255
页数：7
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