YANG Wenying LU Fanxiu ZHANG Shouhua University of Science and Technology Beijing
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Beijing
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China Department of Materials Science and Engineering
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University of Science and Technology Beijing
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Beijing
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100083
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China
金属学报(英文版)
The “order-disorder” model was adopted to calculate the lattice vacancies related to the com- position change in Ni_3Al alloys.A great deal of vacancies,i.e.,the non-stoichiometric vacan- cies,may exist in the Ni_3Al alloys containing Al over stoichiometry,i.e.25 at.-%.This was confirmed by the positron annihilation technique.Therefore,the influence of Al content on the enhancing behaviour of B towards the ductility of Ni_3Al alloys can be understood by the interaction of non-stoiehiometric vacancies and B atoms.
关键词:
Intermetallic compounds
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