冷轧 Ni/Ti 多层中的固态非晶化反应——Ⅱ.恒速升温退火处理(英文)  

SOLID STATE AMORPHIZATION REACTION IN COLD-ROLLED Ni/Ti MULTILAYERS ——Ⅱ.A CONSTANT-HEATING-RATE ANNEALING TREATMENT

作　　者：沈同德[1] 全明秀[1] 王景唐[1] 胡壮麒[1] 

机构地区：[1]中国科学院金属研究所

出　　处：《材料科学进展》1993年第3期189-193,共5页

基　　金：Supported subject by NSFC 5880014

摘　　要：通过重复冷轧 Ni/Ti 包覆粉末制备出 Ni/Ti 多层。使用 XRD,SEM,TEM,DSC 和磁性分析方法研究了该多层由恒速升温退火导致的固态非晶化反应。恒速升温退火时多层中首先形成非晶相,当非晶相层厚超过一临界值后,元素间将通过互扩散形成金属间化合物 Ni_3Ti 和 NiTi,最后已形成的非晶相晶化成金属间化合物 Ni_3Ti 和 Ti_2Ni。首次利用扩散控制的层长大机制和瞬时形核模型,计算了恒速升温退火处理时多层中非晶层长大厚度和金属间化合物的形成温度。The Ni/Ti multilayers were produced through repeated cold rolling of coated Ni/Ti pow-der.The solid state amorphization reactions induced by a constant-heating-rate annealing in themultilayers were studied by means of XRD,SEM,TEM,DSC and magnetic analysis.Upon annealing at aconstant heating rate,an amorphous phase initially forms in the multilayers.As the amorphous layer thick-ness exceeds a critical value,the intermetallic Ni_3Ti and NiTi phases appear through theinterdiffusion of elements.Finally,the formed amorphous phase crystallizes into intermetallic compounds,Ni_3Ti and Ti_2Ni.A diffusion-controlled layer growth mechanism and a transient-nucleation model wereused to calculate,for the first time,the grown amorphous layer thickness and the temperature of formationof intermetallic compounds for the Ni/Ti multilayers undertaken a constant-heating-rate annealing.

关 键 词：非晶化反应 升温 退火 钛 镍 冷轧 

分 类 号：TG337.6[金属学及工艺—金属压力加工]