In situ synthesis of composite MTiO3-Al2O3 coatings via laser zone melting

被引：17
作者：
Lennikov, V. V.
Pedra, J. M.
Gomez, J. J.
de la Fuente, G. F. [1 ]
Carda, J. B.
机构：
[1] Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, Zaragoza, Spain
[2] Univ Jaume 1, Dept Quim Inorgan & Organ, Castellon de La Plana, Spain
[3] Univ Jaume 1, Serv Cent Instrument Cientif, Castellon de La Plana, Spain
来源：
SOLID STATE SCIENCES | 2007年 / 9卷 / 05期
关键词：
laser zone melting; MTiO3-Al2O3 composite coatings; aluminates;
D O I：
10.1016/j.solidstatesciences.2007.03.013
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Laser zone melting was employed in this work to prepare MTiO3 based coatings over commercial, polycrystalline Al2O3 substrates, using the corresponding mixtures of powdered alkaline earth carbonates and TiO2 as starting materials. In situ synthesis of the series M=Ca, Sr, Ba was studied using a CO2 laser as the heating source, emitting at 10.6 mu m, following substrate preheating to a temperature of 750 degrees C and sample displacement speed of 500 mm h(-1). Microstructure (SEM) and phase composition (XRD) demonstrated in situ formation of crystalline MTiO3 perovskite (M=Ca, Sr), MAl2O4 (M=Ca), MAl12O19 magnetoplumbite type (M=Sr) and MAl14O22 beta-alumina type (M=Ba) phases. Substantial interaction with the substrate resulted in stable, 50-150 mu m thick, composite coatings. (c) 2007 Elsevier Masson SAS. All rights reserved.
引用
收藏
页码：404 / 409
页数：6
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