SYNTHESIS AND PROPERTIES OF NI-ALPHA-AL2O3 COMPOSITES VIA SOL-GEL

被引：53

作者：

RODEGHIERO, ED ^{[1
]}

TSE, OK ^{[1
]}

CHISAKI, J ^{[1
]}

GIANNELIS, EP ^{[1
]}

机构：

[1] CORNELL UNIV,ITHACA,NY 14853

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1995年 / 195卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

NICKEL; ALUMINUM; OXYGEN; COMPOSITES; SOL-GEL TECHNIQUES;

D O I：

10.1016/0921-5093(94)06514-4

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Ni-alpha-Al2O3 metal-ceramic composites with metal loadings ranging from 33 to 67 vol.% were synthesized via a sol-gel (both polymeric and colloidal) technique. The polymeric route involves introducing nickel formate during the hydrolysis and condensation of aluminum isopropoxide while the colloidal route involves precipitating Ni(OK), onto boehmite particles. Transformation to Ni-alpha-Al2O3 composites is accomplished by calcination in a reducing environment followed by hot pressing at about 1400 degrees C in an oxygen partial pressure of 10(-12) atm. The composites exhibit a highly interconnected microstructure, composed of continuous Ni and alumina networks, and enhanced fracture properties compared with pure alumina.

引用

页码：151 / 161

页数：11

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