纳米晶Al88Ce2Ni10铝合金的形成

FORMATION OF NANOCRYSTALLINE Al88Ce2Ni10 ALUMINUM ALLOY

通过晶化法，可以将快凝Ａｌ８８Ｃｅ２Ｎｉ１０非晶铝合金制备成纳米晶合金。纳米晶合金的组织为αＡｌ固溶体和金属间化合物Ａｌ３Ｎｉ及Ａｌ１１Ｃｅ３组成的多相纳米晶结构。在６０３～７７３Ｋ较宽退火温区内，用Ｓｃｈｅｒｅｒ公式计算各晶化相，得到αＡｌ、Ａｌ３Ｎｉ及Ａｌ１１Ｃｅ３的晶粒尺寸分别为３１～３１６、２２～２０７及１９～１６５ｎｍ。结果表明，通过控制热处理条件，可以获得不同晶粒尺寸的纳米晶合金。其中获得晶粒细小。

Nanocrystalline alloy has been prepared by crystallization from rapidly solidified Al88Ce2Ni10 amorphous aluminum alloy. Microstructure of nanocrystalline alloy is a multiphase nanocrystalline structure composed of α Al solid solution and intermetallic compounds Al 3Ni and Al 11 Ce 3. In a wide range of annealing temperature 603～773 K, the grain sizes of crystallization phases α Al, Al 3Ni and Al 11 Ce 3 calculated by Scherrer formula are 31～316, 22～207 and 19～165 nm, respectively. It is concluded that the different size nanocrystalline alloys can be obtained by the control of heat treatment condition, in which the optimum annealing temperature of nanocrystalline alloy with small grain and homogeneous structure is near the second DSC peak.