Microstructure, deformation and cracking characteristics of thermal spray ferrous coatings

被引：75

作者：

Rabiei, A

Mumm, DR

Hutchinson, JW

Schweinfest, R

Rühle, M

Evans, AG

机构：

[1] Harvard Univ, Div Engn & Appl Sci, Cambridge, MA 02138 USA

[2] Princeton Mat Inst, Princeton, NJ 08540 USA

[3] Max Planck Inst, Stuttgart, Germany

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1999年 / 269卷 / 1-2期

关键词：

thermal spray coating; local fracture toughness; indentation test; high velocity oxyfuel process; plasma transfer wire arc process; atomic force microscopy;

D O I：

10.1016/S0921-5093(99)00132-X

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The microstructure and local mechanical characteristics of thermal spray ferrous coatings have been determined. The emphasis has been on coatings made by the high velocity oxyfuel (HVOF) process, especially the role of Al alloy additives. The oxide phase present in the material and preferred pathways for local cracking and separation have been determined. Thin intersplat oxide layers emerge as preferential sites. These oxides are amorphous and the cracks extend along the oxide/alpha-Fe interfaces with low local fracture toughness, in the range 0.2-1 MPa root m. These low toughness pathways govern coating deterioration. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：152 / 165

页数：14

共 24 条

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