METALLIC GLASSES Damage tolerance at a price

被引：22

作者：

Greer, A. Lindsay ^{[1
]}

机构：

[1] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England

来源：

NATURE MATERIALS | 2011年 / 10卷 / 02期

关键词：

D O I：

10.1038/nmat2949

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：

Researchers have discovered a category of metallic glass that shows a high toughness against fracture and establishes metallic glasses as materials with the highest known damage tolerance. The composition of the new metallic glass is composed of Pd79Ag3.5P6Si9.5Ge 2 and can be cast as fully glassy rods up to 6 mm in diameter. characterization of such behavior is in terms of fracture toughness that scales with the maximum load that can be applied before fracture occurs. The researchers used a well-tried approach based on measuring the crack-tip opening displacement as a measure for tough materials available in limited cross-sections. Their estimate of fracture toughness roughly doubled than that of any earlier reported for a metallic glass and was comparable with the highest values for any material.

引用

页码：88 / 90

页数：3

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