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yifei8766

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[求助] 如何制备Ni-Al固溶体!!!

如何制备Ni-Al固溶体!!!
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xhtangxh

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yifei8766(金币+2): 2011-06-24 12:22:06
想自己制备Raney Nickel?可以按这个步骤试试:
在刚玉或石墨坩埚中先将铝熔化,升温至1000oC加入镍粉,生成合金放热自升温至约1500oC,用石墨棒搅拌20~30分钟以使组分化合均匀,然后冷却。
根据Ni-Al二元相图,不同比例下可能有组成为NiAl3、Ni2Al3、NiAl、Ni3Al等形式的固溶体。控制镍和铝的比例熔融后采用自然冷却方法,可以使合金具有规则的结晶结构,防止偏析造成组成不均匀。
2楼2011-06-20 16:22:25
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