Sc提高锆基块体非晶合金玻璃形成能力的机理  

The Mechanism of Sc Increaseing the Glass Forming Ability of a Zirconium Based Bulk Amorphous Alloy

作　　者：李洋[1] 贺林[2] 孙军[2] 江峰[2] 

机构地区：[1]中国石油天然气集团管材研究所,陕西西安710065 [2]西安交通大学金属材料强度国家重点实验室,陕西西安710049

出　　处：《稀有金属材料与工程》2006年第11期1740-1743,共4页Rare Metal Materials and Engineering

基　　金：教育部行动计划"纳米材料的非晶晶化";国家自然科学基金(50501017)

摘　　要：以Zr52.5Cu17.9Ni14.6Al10Ti5五元锆基非晶合金为研究对象,在以工业级海绵锆为原料制备的合金中加入元素Sc,制备出楔形试样,从微观角度分析了元素Sc提高非晶合金玻璃形成能力的机理。结果表明,元素Sc的加入可显著改变Zr52.5Cu17.9Ni14.6Al10Ti5五元锆基块体非晶态合金在非晶态-晶态过渡区中先析相的相结构及组织形态。元素Sc强烈的脱氧作用可减少合金中锆氧化物/锆氧团簇,从而消除了过冷液体中异质形核的核心,提高了Zr52.5Cu17.9Ni14.6Al10Ti5五元锆基块体非晶态合金的玻璃形成能力。Quintary Zr52.5Cu17.9Ni14.6Al10Ti5 bulk amorphous alloys were synthesized with industrial sponge zirconium. The wedge-shaped samples added with Sc were prepared. The mechanism of Sc increaseing the GFA of the ahoy was analyzed by means of X-ray diffraction. SEM and Energy Spectrum Analysis. The results showed that adding Sc to the alloy could cause the transformation of phase structure and the composition of the pre-separation phase in the transitional region of the quintary alloy. Sc with great capacity of deoxidization could decrease the existence of Zirconium oxide or Zirconium/oxygen clusters in the alloy, and eliminate heterogeneous nucleants in the melt. Consequently. adding Sc to the alloy could increase the GFA of the quintary alloy.

关 键 词：块体金属玻璃 过渡区 玻璃形成能力 锆基非晶合金 

分 类 号：TG139.8[一般工业技术—材料科学与工程]