Micromechanical testing of a thermally grown oxide on a MCrAlY coating

被引：7

作者：

Chen, Ying ^{[1
]}

Xiao, Ping ^{[1
]}

机构：

[1] Univ Manchester, Dept Mat, Henry Royce Inst, Manchester M13 9PL, Lancs, England

来源：

SURFACE & COATINGS TECHNOLOGY | 2021年 / 419卷

基金：

英国工程与自然科学研究理事会;

关键词：

TGO; MCrAlY; Micromechanical testing; Stiffness; Fracture toughness; FILM MECHANICAL-PROPERTIES; RARE-EARTH DOPANTS; FRACTURE-TOUGHNESS; MICRO-CANTILEVER; ELASTIC-MODULUS; GRAIN-SIZE; BOND COAT; DEPENDENCE; HARDNESS; FAILURE;

D O I：

10.1016/j.surfcoat.2021.127300

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The stiffness and fracture toughness of a thermally grown oxide (TGO) on a MCrAlY coating were measured by the microcantilever bending technique. TGO cantilevers were prepared by a focused ion beam and bent in-situ by a nanoindenter in a scanning electron microscope. The Young's modulus and fracture toughness of the TGO were determined to be 352 GPa and 4.4 MPa.m(1/2), respectively. The measurement results were compared with mechanical properties of the TGOs and bulk alpha-Al2O3 ceramics reported in the literature to develop a mechanistic understanding of the microstructural features governing the stiffness and fracture toughness of the TGO.

引用

页数：7

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