摘要
本文采用X射线衍射及透射电镜测试方法研究了Al-Zn-Ce合金的非晶形成能力及其晶化行为。随着Ce含量的增加,Al2Zn2Ce和Al4Ce金属间化合物的出现,阻止了Al相和Zn相的相分离,有利于形成单一的非晶相,从而提高了合金的非晶形成能力。Al-Zn-Ce非晶合金的晶化存在相选择行为,Al2Zn2Ce和Al4Ce与fcc-Al相竞争形核生长,同时Al2Zn2Ce的形核生长优于Al4Ce,多种相的竞争形核和有限生长有利于Al-Zn-Ce非晶合金的形成。
The glass formability and crystallization behavior of Al-Zn-Ce alloys have been studied by X-ray diffraction（XRD） and transmission electron microscope（TEM）.As the concentration of Ce increases,Al2Zn2Ce and Al4Ce intermetallic compound appear,which prevent the original phase from separating into Al and Zn phases,and improve the stability of the single phase.There exists phase selection behavior in the crystallization of Al-Zn-Ce amorphous alloys.It seems that the Al2Zn2Ce and AlCe4 compete with the fcc-Al phase for nucleation and the growth of fcc-Al and Al2Zn2Ce prefers to that of AlCe4.Thus,the competitive nucleation and growth limitation of the various phases are critical for the glass formation of Al-Zn-Ce alloys.
出处
《金属功能材料》
CAS
2010年第4期10-14,共5页
Metallic Functional Materials
基金
山东省自然科学基金资助项目(Y2006B25)
关键词
铝基非晶合金
非晶形成能力
晶化
Al-based amorphous alloys
glass forming ability
crystallization
