MECHANICAL-PROPERTIES OF INTERPENETRATING MICROSTRUCTURES - THE AL2O3/C-ZRO2 SYSTEM

被引：22

作者：

FRENCH, JD ^{[1
]}

CHAN, HM ^{[1
]}

HARMER, MP ^{[1
]}

MILLER, GA ^{[1
]}

机构：

[1] LEHIGH UNIV,MAT RES CTR,BETHLEHEM,PA 18015

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1992年 / 75卷 / 02期

关键词：

D O I：

10.1111/j.1151-2916.1992.tb08196.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：

Composites of Al2O3 (A) and cubic ZrO2 (Z) (8 mol% Y2O3) (with c-ZrO2 volume fractions ranging from 0 to 1) were fabricated by pressureless sintering of mechanically mixed powders. The microstructures of the AZ composites were duplex, with the grains of both phases exhibiting similar size. Room-temperature mechanical properties including Young's modulus (determined from elastic wave velocity measurements), strength and toughness (by indentation-strength-inbending), and Vickers microhardness were evaluated for the full range of compositions. All properties exhibited a linear decrease with increasing c-ZrO2 content, and no R-curve behavior was seen in any of the composite compositions. Fracture morphology, observed from cracks emanating from microhardness indentations, changed from essentially intergranular for the tougher Al2O3 to transgranular for c-ZrO2, with AZ composites exhibiting mixed morphology.

引用

页码：418 / 423

页数：6

共 42 条

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