Influencia de la densidad de dislocaciones en la tensión de maclado romboédrico del zafiro (α-Al 2 O 3 )
Influencia de la densidad de dislocaciones en la tensión de maclado romboédrico del zafiro (α-Al 2 O 3 )
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对 maclado romboédrico del zafiro (α-Al 2 O 3 ) 张力的脱位密度的影响 (α-Al 2 O 3 )
DOI：
10.3989/revmetalm.2001.v37.i2.482
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发表时间：
2001
影响因子：
0.8
通讯作者：
A. Domínguez
中科院分区：
文献类型：
--
作者：
A. Muñoz;J. Castaing;A. Domínguez
本文研究了位错对α-Al 2 O3单晶中诱发菱面体孪晶应力的影响。位错密度已经被在1.000和1.300 °C之间的温度下，在高达400 MPa的应力下压缩引起的基底滑移所改变。由于这种预变形，蓝宝石在900 °C下更耐孪生，硬化对应于应力增加10倍。孪晶结构受到阻碍孪晶界运动的位错的强烈影响;因此，对于高位错密度，与低密度的情况相反，形成非常薄的孪晶层。
The influence of dislocations on the stress to induce rhombohedral twinning has been examined in α-Al 2 O 3 ) single crystals. Dislocation densities have been modified by basal slip induced by compression at temperatures between 1.000 and 1.300 °C, at stresses up to 400 MPa. As a consequence of this pre-deformation, sapphire is more resistant to twinning at 900 °C, the hardening corresponding to a stress increase by a factor of 10. The twin structure is strongly influenced by the dislocations which impede the motion of twin boundaries; therefore, for high dislocation density very thin twin lamellae are formed contrary to the case for low density.