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Effect of high pressure on the mechanical properties of lithium disilicate glass ceramic

机译：高压对二硅酸锂玻璃陶瓷力学性能的影响

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摘要

Lithium disilicate glass has been submitted to a high pressure treatment associated to a heat treatment, and the effects of densification and crystallization at high pressure on the mechanical properties were evaluated. The hardness and elastic modulus were examined by instrumented indentation using a Berkovich tip. The crack pattern morphology after indentation with a cube corner indenter was also investigated. The hardness and elastic modulus of the samples submitted to high pressure at room temperature decreased with increasing pressure. The hardness and elastic modulus of the samples submitted simultaneously to high pressure (up to 7.7 GPa) and high temperature increased noticeably. The amount, length and type of cracks induced by the cube corner tip changed with increasing pressure. These results indicate that the high temperature treatment under high pressure improved the mechanical properties of LS_2.
机译：已经对二硅酸锂玻璃进行了与热处理相关的高压处理，并且评估了高压下的致密化和结晶化对机械性能的影响。硬度和弹性模量通过使用Berkovich尖端的仪器压痕进行检查。还研究了使用立方角压头压痕后的裂纹图案形态。随着压力的升高，在室温下经受高压的样品的硬度和弹性模量降低。同时经受高压（高达7.7 GPa）和高温的样品的硬度和弹性模量显着增加。立方角尖端引起的裂纹的数量，长度和类型随压力的增加而变化。这些结果表明，高压下的高温处理改善了LS_2的机械性能。

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  • 来源
    《Materials Science and Engineering》 |2011年第11期|p.3921-3924|共4页
  • 作者

    Silvio Buchner; Carlos M. Lepienski; Paulo C. Soares Jr; Naira M. Balzaretti;

  • 作者单位

    LAPMA - High Pressure and Advanced Materials Laboratory, Physics Institute, Universidade Federal do Rio Grande do Sul, CP 15051, Porto Alegre, RS, CEP91501-970, Brazil;

    LabNano - Laboratory ofNanomechanical Properties, Physics Department, Universidade Federal do Parand, 81531-990 Curitiba,PR, Brazil;

    Mechanical Engineering Department, Pontiftcia Universidade Catdlica do Parand, 80215-901 Curitiba,PR, Brazil;

    LAPMA - High Pressure and Advanced Materials Laboratory, Physics Institute, Universidade Federal do Rio Grande do Sul, CP 15051, Porto Alegre, RS, CEP91501-970, Brazil;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    hardness measurement; mechanical characterization; nanoindentation; glass;

    机译：硬度测量;机械特性纳米压痕玻璃;

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