Ceramic composites with a ductile Ni3Al binder phase

被引：79

作者：

Tiegs, TN

Alexander, KB

Plucknett, KP

Menchhofer, PA

Becher, PF

Waters, SB

机构：

[1] Oak Ridge National Laboratory, Oak Ridge

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1996年 / 209卷 / 1-2期

关键词：

hardmetal composites; ceramic powders;

D O I：

10.1016/0921-5093(95)10128-4

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Composites of B-doped ductile Ni3Al alloys with both non-oxide (WC, TiC) and oxide (Al2O3) ceremic powders were produced by hot-pressing. The Ni3Al alloys wet the non-oxide ceramic powders well and form a semi-continuous intergranular phase. However, the Ni3Al alloys do not wet the oxide powders well and tend to form discrete ''islands'' of the metallic phase. Mechanical property testing showed the flexural strength is retained to temperatures of at least 800 degrees C. The fracture toughness and hardness were found to be equal to or higher than comparable Go-based hardmetal systems. Initial corrosion tests showed excellent resistance to acid solutions.

引用

页码：243 / 247

页数：5

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