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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Influence of the manufacturing process on the crystallization behavior of a CZS glass system
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Influence of the manufacturing process on the crystallization behavior of a CZS glass system

机译：制造工艺对CZS玻璃系统结晶行为的影响

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摘要

A glass belonging to the CaO-ZrO2-SiO2 (CZS) System has been plasma-sprayed on ceramic tiles. The crystallization behavior of plasma-sprayed coatings has been compared to the devitrification processes of the bulk glass and sintered glass powders of the same composition. DTA experiments reveal a crystallization peak at about 1323 K, with a quite high activation energy, indicating the bulk crystallization process is difficult, because of the high viscosity of the glass. Bulk samples require higher treatment temperatures (approximate to 1423 K) to develop significant amounts of crystalline phases. Furthermore, being the crystallization mostly superficial, high residual stresses develop between the crystalline surface and the glassy core. Sintered samples are fully crystalline, because crystallization starts from the particle surface, the specimens show a considerable shrinkage. After an 1123 K 30' + 1323 K 15' thermal treatment, plasma-sprayed coatings, possessing numerous defects and a slight degree of devitrification induced by thermal cycling during plasma deposition, become very well sintered and completely crystalline, because the as-sprayed microstructural features promote heterogeneous nucleation. In this case, the shrinkage is quite negligible, since partial sintering occurs already during the deposition process. In the fully crystalline coatings, excellent mechanical properties (microhardness, fracture toughness and abrasion resistance) are achieved, overcoming those of traditional industrial glazes. (c) 2005 Elsevier B.V. All rights reserved.
机译：属于CaO-ZrO2-SiO2（CZS）系统的玻璃已等离子喷涂在瓷砖上。已将等离子喷涂涂层的结晶行为与相同组成的块状玻璃和烧结玻璃粉末的失透过程进行了比较。 DTA实验显示出约1323 K的结晶峰，具有相当高的活化能，表明由于玻璃的高粘度，本体结晶过程很困难。大量样品需要更高的处理温度（约1423 K）才能形成大量的结晶相。此外，由于结晶大部分是表面的，因此在结晶表面和玻璃状核之间会产生高残留应力。烧结的样品是完全结晶的，因为从颗粒表面开始结晶，所以样品显示出相当大的收缩。经过1123 K 30'+ 1323 K 15'热处理后，由于喷涂后的微结构，等离子体喷涂的涂层具有许多缺陷，并且在等离子体沉积过程中由于热循环而引起的轻微失透现象变得非常烧结且完全结晶，特征促进异质形核。在这种情况下，收缩率可以忽略不计，因为在沉积过程中已经发生了部分烧结。在全结晶涂层中，具有优异的机械性能（显微硬度，断裂韧性和耐磨性），克服了传统工业用釉的机械性能。 （c）2005 Elsevier B.V.保留所有权利。

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