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脊椎固定器在较狭窄的手术视野中应能够随着脊椎侧弯的程度进行简单的形变,且不应产生大的回弹。然而为了抑制应力屏蔽效应,又要求其具有低的弹性模量。为此,大阪大学H.H.Liu研发了通过具有高弹性模量的变形诱发ω相来控制的自调整型Ti-9Cr-0.2O合金,在变形区可以获得高弹性模量,未变形区仍维持低弹性模量。为改善合金弹性模量的自调整特性,探讨了变形诱发ω相的形成机理。
Vertebral fixators should be able to simply deform with the degree of scoliosis in a narrower surgical field of view and should not cause a large rebound. However, in order to suppress the stress shielding effect, it is required to have a low elastic modulus. To this end, HHLiu from Osaka University developed a self-adjusting Ti-9Cr-0.2O alloy controlled by the deformation-induced ω phase with a high elastic modulus. The high elastic modulus can be obtained in the deformation zone while the undeformed zone remains low Elastic Modulus. In order to improve the self-adjusting property of alloy elastic modulus, the forming mechanism of deformation induced ω phase was discussed.