Transformation kinetics in plasma-sprayed barium- and strontium-doped aluminosilicate (BSAS)

被引：23

作者：

Harder, B. J. ^{[1
]}

Faber, K. T. ^{[1
]}

机构：

[1] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA

来源：

SCRIPTA MATERIALIA | 2010年 / 62卷 / 05期

基金：

美国国家科学基金会;

关键词：

Electron backscattered diffraction (EBSD); Crystallization; Plasma spraying; Coating; Phase transformation kinetics; ENVIRONMENTAL BARRIER COATINGS; CELSIAN PHASE-TRANSFORMATION; SILICON-BASED CERAMICS; RESIDUAL-STRESS; CRYSTALLIZATION; BAO-AL2O3-SIO2; OXIDATION; CORROSION;

D O I：

10.1016/j.scriptamat.2009.11.019

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The hexacelsian-to-celsian phase transformation in Ba1-xSrxAl2Si2O8 is of interest for environmental barrier coating applications. Plasma-sprayed microstructures were heat treated above 1100 degrees C and the kinetics of the hexacelsian-to-celsian transformation were quantified. Activation energies for bulk and crushed materials were determined to be similar to 340 and similar to 500 kJ mol(-1), respectively. X-ray diffraction and electron backscattered diffraction were used to establish how plasma spraying barium- and strontium-doped aluminosilicate effectively reduces the energy required for its transformation. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：282 / 285

页数：4

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