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论文类型：期刊论文

发表时间：2018-05-25

发表刊物：JOURNAL OF ALLOYS AND COMPOUNDS

收录刊物：SCIE、EI

卷号：746

页面范围：356-360

ISSN号：0925-8388

关键字：Quasi-crystals; Intermetallic compounds; Solidification; Element addition

摘要：The quasi-crystal-forming alloys with adjustable compositions were prepared by element-addition to a pre-existing pure quasi-crystalline system. The protocol alloy Zr40Ti40Ni20 was chosen as the parent alloy, and beryllium was used as the additive element. The quasi-crystal forming ability was found to be enhanced with Be content within a wide composition range of (Zr40Ti40Ni20)(100-x)Be-x (0 <= x <= 16). A maximum size of up to 10mm in diameter of pure quasi-crystalline rod was attained at a composition of (Zr40Ti40Ni20)(84)Be-16. Structural analyses show that Be-addition continuously reduces the interplanar spacing. The mechanism of the enhanced quasi-crystal forming ability was also discussed. (c) 2018 Elsevier B.V. All rights reserved.