The Influence of Noble Metals on the Properties of Antiferromagnetic Invar-Type Mn-Ge Alloys
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- Nakayama Takafumi
- The Research Institute of Electric and Magnetic Alloys
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- Masumoto Hakaru
- The Research Institute of Electric and Magnetic Alloys
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- Kikuchi Michio
- The Research Institute of Electric and Magnetic Alloys
Bibliographic Information
- Other Title
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- 反強磁性インバー型Mn-Ge合金の諸特性におよぼす貴金属の影響
- ハン キョウジセイ インバーカタ Mn Ge ゴウキン ノ ショ トクセイ ニ
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Description
The thermal expansion, magnetic property, hardness and workability were investigated for Mn-22%Ge based ternary ε phase alloys containing noble metals in the groups VII A, VIII and I B in the periodic table. In thermal expansion curves of the ternary alloys there appear minima corresponding to the Néel point of the ε phase, showing the Invar characteristics below this temperature. The thermal expansion coefficients of the ternary alloys in the vicinity of room temperature show zero or a negative value. The spontaneous volume magnetostriction of Mn-22%Ge-0.9%Ir, 1.7%Ag and 0.9%Au alloys at 77 K is about 1.3×10−2, and it is hardly affected by the kind of additional element and nearly equal to that of Mn-22%Ge binary alloy and Invar-type Fe-Ni or Fe-Pt alloys. The magnetization of the ternary alloys shows almost the same temperature dependence as that of Mn-22%Ge binary alloy which shows a parasitic ferromagnetism. The magnetization at T⁄TN=0.65 decreases with increase of the additional elements except for Ag. The Néel point of the ε phase is scarcely affected by the third elements except for Ir, Pt and Re.<BR>The Vickers hardness of almost all ternary alloys containing the noble metals less than 2 percent shows a value lower than that of Mn-Ge alloys, and they are superior in machinabilities such as cutting and forging to the binary alloys.
Journal
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- Journal of the Japan Institute of Metals and Materials
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Journal of the Japan Institute of Metals and Materials 49 (1), 84-88, 1985
The Japan Institute of Metals and Materials
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Details 詳細情報について
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- CRID
- 1390282681462817280
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- NII Article ID
- 130007340197
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- NII Book ID
- AN00187860
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- ISSN
- 18806880
- 24337501
- 00214876
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- NDL BIB ID
- 3021628
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed