Decagonal quasicrystal and related crystalline phases in Mn-Ga alloys with 52 to 63 a/o Ga
文献类型：期刊论文
| 作者 | Wu, JS ; Kuo, KH |
| 刊名 | METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
 |
| 出版日期 | 1997 |
| 卷号 | 28期号:3A页码:729 |
| 关键词 | AL-MN QUASI-CRYSTAL TRANSLATIONAL SYMMETRY SI ALLOYS APPROXIMANTS AL3MN DIFFRACTION TWINS |
| ISSN号 | 1073-5623 |
| 通讯作者 | Wu, JS: DALIAN UNIV TECHNOL,DEPT MAT ENGN,DALIAN 116024,PEOPLES R CHINA. |
| 中文摘要 | A decagonal quasicrystal (DQC) and six related intermetallic phases with large unit cells have been found in binary Mn-Ga alloys with 52 to 63 at. pct Ga by means of transmission electron microscopy (TEM). As does the Al-Mn DQC, the Ga-Mn DQC also has a periodicity of 1.25 nm along its tenfold axis. However, its Mn content, determined by electron microprobe X-ray analysis (about 45 to 50 at. pct Mn), is much higher than that of the Al-Mn DQC (about 20 to 30 at. pct Mn). The compositions of the intermetallic phases are about 53, 56, 58, and 62 at. pct Ga, corresponding respectively to the unknown structures of MnGa (50.7 to 53.4 at. pct Ga), Mn5Ga6 (55 at. pct Ga), Mn5Ga7 (57.9 at. pct Ga), and Mn3Ga5 (62.9 at. pct Ga) given in the binary Mn-Ga phase diagram (Metals Handbook, T.B. Massalski, J.L. Murray, L.H. Benneft, and H. Baker, eds., ASM, Metals Park, OH, 1986, vol. 2, p. 1144). Their lattice types have been determined by selected area electron diffraction. The ferromagnetic Mn3Ga5 is tetragonal, a = 1.25 nm and c = 2.50 nm; Mn5Ga7 is orthorhombic, a = 4.57 nm, b = 1.25 nm, and c = 1.44 nm; Mn5Ga6 has two different but closely related orthorhombic unit cells, a = 1.26 nm, b = 1.25 nm, and c = 1.48 nm as well as a = 0.77 nm, b = 1.25; nm, and c = 2.36 nm; MnGa also has two different and related unit cells, one orthorhombic with a 2.04 nm, b = 1.25 nm, and c = 1.48 nm and the other monoclinic with a = 2.59 nm, b = 1.25 nm, c = 1.15 nm, and beta congruent to 110 deg. All these orthorhombic phases have b = 1.25 nm, being the same as the periodicity along the tenfold axis of the Ga-Mn and Al-Mn DQCs. Moreover, all these six intermetallic phases give electron diffraction patterns displaying a pseudo-tenfold distribution of strong diffraction spots and are considered to be crystalline approximants of the Ga-Mn DQC. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/35640]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Wu, JS,Kuo, KH. Decagonal quasicrystal and related crystalline phases in Mn-Ga alloys with 52 to 63 a/o Ga[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,1997,28(3A):729. |
| APA | Wu, JS,&Kuo, KH.(1997).Decagonal quasicrystal and related crystalline phases in Mn-Ga alloys with 52 to 63 a/o Ga.METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,28(3A),729. |
| MLA | Wu, JS,et al."Decagonal quasicrystal and related crystalline phases in Mn-Ga alloys with 52 to 63 a/o Ga".METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 28.3A(1997):729. |
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来源：物理研究所
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