| Project/Area Number |
62550519
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
金属材料(含表面処理・腐食防食)
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| Research Institution | Toyohashi University of Technology |
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Principal Investigator |
MORINAGA Masahiko Toyohashi University of Technology, Associate Professor, 工学部, 助教授 (50126950)
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| Co-Investigator(Kenkyū-buntansha) |
MURATA Yoshinori Toyohashi University of Technology, Research Associate, 工学部, 助手 (10144213)
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| Project Period (FY) |
1987 – 1988
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| Project Status |
Completed (Fiscal Year 1988)
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| Budget Amount *help |
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1988: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1987: ¥1,100,000 (Direct Cost: ¥1,100,000)
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| Keywords | aluminium alloys / electronic structure / クラスター法 / アルミニウムの合金 |
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| Research Abstract |
The influence of a number of alloying elements on the electronic structure of aluminium has been investigated by the DV-X cluster method. The energy level structure was modified remarkably by alloying. For transition metals, for instance, this modification was made mainly due to the appcarance of the virtual bound state of d electrons near the Fermi level. The ionicities of alloying elements change monotonously following the electronegativity except for a few elements. The bond order between at oms largely depends on alloying elements. Tfhe activation energy for the 3d impurity diffusion in aluminium can be related with the calculated bond order. An increment of the residual resistivity due to the 3d impurities doped into aluminium also correlates well with the virtual bound state density at the Fermi level. In addition, it is shown from calculations that Mn and Cr are probably the maganetic impurities in aluminium.
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