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The growth and mechanical properties of paratellurite single crystals at high temperatures

机译:高温下星云石单晶的生长和力学性能。

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α-TeO_2 single crystals have been grown by the Czochralski method on specially developed systems with automatic growth control. The mechanical properties of crystals under compression in the [100], [110], and [221] directions at a constant strain rate of about 10~(-4) s ~(-1) in the temperature range T = 733-993 K have been investigated. The distribution of plastic shear strain in deformed samples is has been experimentally studied. Manifestations of localized strain in covalent paratellurite crystals at T > 900 K are revealed for the first time. The active slip systems along which localized shear band are oriented are determined. The temperature dependence of the critical stress of transition to localized flow is investigated.
机译:α-TeO_2单晶已经通过Czochralski方法在专门开发的具有自动生长控制的系统上生长。在T = 733-993的温度范围内,在约100〜(-4)s〜(-1)的恒定应变速率下,在[100],[110]和[221]方向上受压缩的晶体的机械性能K已被调查。实验研究了变形样品中塑性剪切应变的分布。首次揭示了T> 900 K时共价副卫星晶体中局部应变的表现。确定沿其定位局部剪切带的主动滑动系统。研究了转变为局部流动的临界应力的温度依赖性。

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