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Processing of glasses with engineered stress profiles

机译:具有工程应力曲线的眼镜加工

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摘要

The introduction of a compressive residual stress with a maximum below the glass surface can promote the stable growth of surface flaws and result in high strength value with limited scatter. Such approach has been reduced to practice in recent years using a double ion-exchange process. Obtained glasses have been named as engineered stress profile (ESP) glasses to emphasize the engineering design approach. In the present work, an alternative production technique, based on physical processes to obtain the specific residual stress profile in soda-lime silicate glass is presented.The proposed technique consists of a conventional physical tempering followed by a fast heating treatment necessary to relax the compressive stress on the surface only. Such relaxation is produced by rapid treatment in a fused tin bath. ESP glasses produced in this manner are compared in terms of residual stress profile, mechanical strength and failure behaviour. (C) 2004 Elsevier B.V. All rights reserved.
机译:在玻璃表面以下引入最大的压缩残余应力可以促进表面缺陷的稳定增长,并在有限的散射下产生高强度值。近年来,这种方法已被简化为使用双离子交换过程的实践。所获得的眼镜已被称为工程应力曲线(ESP)眼镜,以强调工程设计方法。在目前的工作中,提出了一种替代的生产技术,该技术基于物理过程以获得钠钙硅酸盐玻璃中的特定残余应力曲线。所提出的技术包括常规的物理回火,然后进行快速热处理以放松压缩应力。仅在表面上施加压力。这种松弛是通过在熔融锡浴中快速处理而产生的。比较以这种方式生产的ESP玻璃的残余应力分布,机械强度和破坏行为。 (C)2004 Elsevier B.V.保留所有权利。

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