CRACK-PROPAGATION BEHAVIOR OF CVD SI3N4-TIN COMPOSITE EXAMINED BY HIGH-RESOLUTION ELECTRON-MICROSCOPY

被引：15

作者：

LEE, BT ^{[1
]}

HAYASHI, S ^{[1
]}

HIRAI, T ^{[1
]}

HIRAGA, K ^{[1
]}

机构：

[1] TOYOTA TECHNOL INST,TENPAKU KU,NAGOYA 468,JAPAN

来源：

MATERIALS TRANSACTIONS JIM | 1993年 / 34卷 / 07期

关键词：

SI3N4-TIN COMPOSITE; HIGH-RESOLUTION ELECTRON MICROSCOPY; CHEMICAL VAPOR DEPOSITION; MICRO-INDENTATION FRACTURE; TOUGHENING MECHANISM;

D O I：

10.2320/matertrans1989.34.573

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Crack propagation behavior of a chemical vapor deposited (CVD) Si3N4-TiN composite was investigated by microindentation fracture (MIF) and high-resolution electron microscopy (HREM) techniques. TiN fibers are homogeneously dispersed in large Si3N4 grains (about 8 mum in diameter), leading to an intragranular nano-composite structure, and their interfaces were directly bonded without any other phases. The main fracture mode is a mixed type of intergranular and transgranular fracture. Nanometer-sized TiN dispersed in the matrix grains interacts with cracks, generating crack bridging and microcracking which toughens the composite.

引用

页码：573 / 579

页数：7

共 11 条

[1] TOUGHENING IN BRITTLE SYSTEMS BY DUCTILE BRIDGING LIGAMENTS [J].