The Hardness and Strength Properties of WC-Co Composites

被引：68

作者：

Armstrong, Ronald W. ^{[1
]}

机构：

[1] Univ Maryland, Dept Mech Engn, Ctr Energet Concepts Dev, College Pk, MD 20742 USA

来源：

MATERIALS | 2011年 / 4卷 / 07期

关键词：

hardness; cracking; indentation fracture mechanics; dislocations; fracture stress; stress intensity; WC-Co composite; cemented carbide; WC; MgO; Al2O3; toughness; Hall-Petch relation; contiguity; GRAIN-SIZE RELATIONS; FRACTURE-TOUGHNESS; MECHANICAL-PROPERTIES; PLASTIC-DEFORMATION; SINGLE-CRYSTALS; MGO; NANOINDENTATION; BEHAVIOR; ALUMINA; CRACK;

D O I：

10.3390/ma4071287

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The industrially-important WC-Co composite materials provide a useful, albeit complicated materials system for understanding the combined influences on hardness and strength properties of the constituent WC particle strengths, the particle sizes, their contiguities, and of Co binder hardness and mean free paths, and in total, the volume fraction of constituents. A connection is made here between the composite material properties, especially including the material fracture toughness, and the several materials-type considerations of: (1) related hardness stress-strain behaviors; (2) dislocation (viscoplastic) thermal activation characterizations; (3) Hall-Petch type reciprocal square root of particle or grain size dependencies; and (4) indentation and conventional fracture mechanics results. Related behaviors of MgO and Al2O3 crystal and polycrystal materials are also described for the purpose of making comparisons.

引用

页码：1287 / 1308

页数：22

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