Effect of Stress-Induced Phase Transformation on the Fracture Toughness of Fe3Al Intermetallic Reinforced with Yttria-Partially Stabilized Zirconia Particles

被引：2

作者：

Talischi, Lima Amiri ^{[1
]}

Samadi, Ahad ^{[1
]}

机构：

[1] Sahand Univ Technol, Dept Mat Engn, POB 51335-1996, Tabriz, Iran

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2017年 / 48A卷 / 10期

关键词：

MECHANICAL-PROPERTIES; ENVIRONMENTAL EMBRITTLEMENT; INDENTATION FRACTURE; MICROSTRUCTURE; THERMODYNAMICS; FABRICATION; CERAMICS; CHROMIUM; STRENGTH; ALUMINA;

D O I：

10.1007/s11661-017-4234-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, fracture toughness and microhardness of Fe3Al intermetallic reinforced with yttria-partially stabilized zirconia (Y-PSZ) particles were investigated. Fe3Al/Y-PSZ composites containing up to 20 wt pct of Y-PSZ were fabricated by hot pressing of powder mixtures. It is found that the microhardness and fracture toughness of Fe3Al intermetallic increase by adding Y-PSZ particles. The maximal levels of fracture toughness and microhardness correspond to Fe3Al-10 wt pct Y-PSZ composite with the fracture toughness of 23.1 MPaaem and the microhardness of 645 HV. The improvement in fracture toughness could be related to the stress-induced structural transformation of zirconia particles from tetragonal to monoclinic which causes crack deflection and prevents crack propagation.

引用

页码：5046 / 5058

页数：13

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