Mechanical properties of polycrystalline translucent cubic boron nitride as characterized by the vickers indentation method

被引：59

作者：

Taniguchi, T ^{[1
]}

Akaishi, M ^{[1
]}

Yamaoka, S ^{[1
]}

机构：

[1] NATL INST RES INORGAN MAT,TSUKUBA,IBARAKI 305,JAPAN

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1996年 / 79卷 / 02期

关键词：

D O I：

10.1111/j.1151-2916.1996.tb08165.x

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：

Mechanical properties of polycrystalline translucent cubic boron nitride (cBN) were characterized by Vickers indentation measurement. The calculated hardness decreased from 54 to 49 GPa as the load increased to 39 N, and then remained constant for values above this load. According to the relationship between crack length and applied indentation load, the formation of the median/radial type of cracks seems to take place at an applied load above 29 N. Assuming that the ratio of hardness and Young's modulus is constant in the polycrystalline cBN, the fracture toughness, K-IC, of cBN was estimated to be 5.0 +/- 0.5 MPa . m(1/2).

引用

页码：547 / 549

页数：3

共 18 条

[1] SYNTHESIS OF TRANSLUCENT SINTERED CUBIC BORON-NITRIDE [J].