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| BORON OCCUPATION IN Ni_3Al ALLOY AND ITS SEGREGATION IN GRAIN BOUNDARY |
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No Author. BORON OCCUPATION IN Ni_3Al ALLOY AND ITS SEGREGATION IN GRAIN BOUNDARY. Chin J Mater Res, 1996, 10(5): 497-500.
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Abstract 危開3Al合金硼原子占位及晶界偏聚##2@李卫民,张迎九,唐仁正,谢佑卿$广东工业大学,中南工业大学##3依据LI2型金属间化合物八面体,四面体间隙的特点,并利用硬球模型计算了上述各类间隙的空球半径大小,发现Ni3Al合金中6Ni八面体间隙空球半径比其他间隙大,使硼原子更易进入6Ni八面体间隙由于富Ni-Ni3Al合金晶界比富Al-Ni3Al合金有更多的6Ni八面体间隙,所以硼在富Ni-Ni3Al晶界偏聚较多另外富Al-Ni3Al合金晶界原子间作用力比富Ni-Ni3Al合金晶界原子间作用力大,这也阻碍了硼
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Received: 25 October 1996
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