Analysis of phase transformation in plasma sprayed alumina coatings using Rietveld refinement

被引：59

作者：

Sabiruddin, Kazi ^{[1
]}

Joardar, J. ^{[2
]}

Bandyopadhyay, P. P. ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Mech Engn, Kharagpur 721302, W Bengal, India

[2] ARCI, Hyderabad 50005, Andhra Pradesh, India

来源：

SURFACE & COATINGS TECHNOLOGY | 2010年 / 204卷 / 20期

关键词：

Plasma spray; Alumina; Rietveld refinement; Coating; POWDER DIFFRACTION; MICROSTRUCTURE;

D O I：

10.1016/j.surfcoat.2010.03.026

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

During plasma spraying of alumina with the stable a phase in the starting powder, metastable phases tend to form in the final coating. This is attributed to the rapid quenching associated with the process. In this paper the weight fraction of metastable phase formed, i.e., stable phase retained, and has been estimated using Rietveld refinement of X-ray diffraction data. This weight fraction depends on the process parameters like standoff distance, primary and secondary gas flow rate, nozzle size, etc., which in turn control particle melting. Under favourable melting conditions the weight fraction of the metastable phases approaches 1. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：3248 / 3253

页数：6

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