Crystallography and microstructure of TaRu
Crystallography and microstructure of TaRu
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DOI：
10.1080/01418619708209965
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发表时间：
1997-07-01
期刊：
影响因子：
--
通讯作者：
Vandermeer, RA
中科院分区：
文献类型：
--
作者：
Fonda, RW;Vandermeer, RA
固态相变和晶体学的等原子TaRu的常规和原位高温透射电子显微镜检查，与互补的实验，使用X射线衍射和衍射仪。该合金从高温B2有序立方相冷却时经历两次位移相变。高温下的α-到-tetraxite转变产生了类似于在许多形状记忆效应合金中观察到的高度孪晶的显微组织。详细的显微衍射表明，由低温转变所产生的相具有单斜对称性，而不是以前报道的正交对称性。这种单斜晶格的结构表明，在这种合金中的欧米茄状转变的可能性。
The solid-state phase transformations and crystallography of equiatomic TaRu were examined by conventional and in-situ high-temperature transmission electron microscopy, with complementary experiments using X-ray diffraction and dilatometry. This alloy undergoes two displacive phase transformations on cooling from the high-temperature B2-ordered cubic phase. The high-temperature cubic-to-tetragonal transformation produces a highly twinned microstructure similar to that observed in many shape memory effect alloys. The phase produced by the low-temperature transformation was shown by detailed microdiffraction to have a monoclinic symmetry rather than the orthorhombic symmetry which had been previously reported. The structure of this monoclinic lattice indicates the possibility of an omega-like transformation in this alloy.