Microhardness and fracture mechanics of flux grown samarium doped gadolinium vanadate (Sm:GdVO4) single crystal

被引：4

作者：

Bamzai, K. K. ^{[1
]}

Nidhi ^{[1
]}

Singh, Vishal ^{[1
]}

Kotru, P. N. ^{[1
]}

Wanklyn, B. M. ^{[2
]}

机构：

[1] Univ Jammu, Crystal Growth & Mat Res Lab, Dept Phys & Elect, Jammu 180006, India

[2] Univ Oxford, Clarendon Lab, Oxford OX1 2JD, England

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2010年 / 71卷 / 10期

关键词：

Inorganic compounds; Oxides; Crystal growth; Mechanical properties; Fracture; VICKERS MICROHARDNESS; INDENTATION FRACTURE; KNOOP MICROHARDNESS; OPTICAL-PROPERTIES; LITHIUM NIOBATE; HARDNESS; CZOCHRALSKI; PERFORMANCE; CERAMICS; LASER;

D O I：

10.1016/j.jpcs.2010.07.001

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Indentation induced hardness studies on flux grown samarium doped gadolinium vanadate (Sm:GdVO4) crystals are reported. Mechanical characteristics including Vickers microhardness, fracture mechanics, crack propagation, brittleness index and yield strength are assessed. The mechanical behaviour of the crystal is explained using various theoretical models viz., Meyer's law, proportional specimen resistance (PSR) and Hays and Kendall's approach. Variation of microhardness with load is found to be non-linear and is best explained by the concept of Newtonian resistance pressure as proposed by Hays and Kendall's law. Classification of cracks as median type is explained. The values of fracture toughness (K-c), brittleness index (B-i) and yield strength (sigma(y)) have also been calculated. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1428 / 1434

页数：7

共 10 条

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