Hard glass-ceramic coating by microwave processing

被引：49

作者：

Das, S. ^{[1
]}

Mukhopadhyay, A. K. ^{[1
]}

Datta, S. ^{[1
]}

Das, G. C. ^{[2
]}

Basu, D. ^{[1
]}

机构：

[1] Cent Glass & Ceram Res Inst, Kolkata 700032, India

[2] Jadavpur Univ, Dept Met & Mat Engn, Kolkata 700032, India

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2008年 / 28卷 / 04期

关键词：

microwave processing; glass-ceramics; microstructure-final; hardness; coatings;

D O I：

10.1016/j.jeurceramsoc.2007.08.003

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 [材料科学与工程]; 080502 [材料学];

摘要：

Microwave processing was employed in the present work to obtain hard glass-ceramic coating on nickel based superalloy substrate. The glass-ceramic coatings were developed from a glass based on MgO-Al2O3-TiO2 system. The coatings were characterized through X-ray diffractometry (XRD), scanning electron microscopy (SEM), image analysis, surface roughness measurement and hardness evaluation by depth sensitive indentation (DSI) technique. Surface and cross-sectional SEM examinations of the polished and etched samples revealed that under identical combination of heat treatment temperature and time, the microwave processed coating contained finer crystallites than the sizes of the crystallites obtained in the conventionally processed coating. The microwave processed glass-ceramic coating exhibited surface roughness (R-a) value much lower than that of the conventionally processed glass-ceramic coating. DSI results confirmed that the microwave processed coating possessed much higher hardness (similar to 6 GPa) compared to that of the conventionally processed coating. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：729 / 738

页数：10

共 21 条

[1]

[Anonymous], 2006, T INDIAN CERAM SOC

[2]

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