王志
,
邵慧萍
,
叶青
,
林均品
,
段启凯
,
林涛
,
郭志猛
,
何新波
功能材料
doi:10.3969/j.issn.1001-9731.2014.10.009
以平均粒径为46μm 的氢化钛粉和平均粒径为6~7μm的铝粉为原料，经过低温高真空加热反应制备TiAl合金粉。研究了不同温度和保温时间后TiH2、Al粉合金化程度，用X射线衍射仪(XRD)分析其物相组成，扫描电子显微镜(SEM)观察其形貌特征。实验结果表明，高能球磨1 h 的 TiH2、Al 粉在500℃保温2 h几乎可以将氢化钛中的氢除去，在750℃保温3 h能够制得高纯度的TiAl 合金粉，合金粉的平均粒径为20μm左右，合金粉颗粒呈不规则形状。
关键词:
氢化钛粉
,
TiAl合金
,
扩散反应
,
低温
,
真空
XU Leying WANG Wenbin ZHUANG Yuzhi Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
China Associate Professor
,
Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
110015
,
China
金属学报(英文版)
Diffusion reaction of superconductig composite NbTi/Cu assembled both mechanically and metallurgically,diffusion couples Ti/Cu and Nb/Cu have/been studied by means of EPMA.The results indicate that the initial interface state of the composite NbTi/Cu significantly affects the forming process of intermetallic compounds at the interface.In comparison with the metallurgically bound composite,the intermetallic com- pounds forms at a higher temperature in mechanically bound one.Therefore.the mechanical hinding process is beneficial to the production of NbTi/Cu superconducting composite. No intermetallic compounds have been observed in Nb/Cu system.The morphology of intermetallic phases and the sequence in which they form in Ti/Cu system are somewhat different from that in NbTi/Cu.The relationship between the thickness of compound layer and annealing time obeys the rule of y~(1.5) ∝ t.
关键词:
superconduetor
,
null
,
null
,
null
,
null
于秋颖
,
方爽
,
熊华平
,
肇恒跃
,
张敏聪
,
王淑云
稀有金属材料与工程
在1473 K,30MPa,1.5h的热压条件下直接烧结TiAl金属间化合物和Ti混合粉末,制备了钛基合金(TiAl+Ti)样品,采用XRD、SEM研究了2种不同成分配比对烧结产物相组成及显微结构的影响.结果表明,不同成分配比热压烧结体的显微组织分布相差较大,但相组成基本相同;对于TiAl和Ti体积比7:3的钛基合金样品,Ti粉末中Fe元素易于固溶到Ti2Al和Ti3Al中,析出相主要由TiAl、Ti2Al(Fe)、Ti3Al(Fe)和富Ti相组成;该比例的混合粉末在热压烧结过程中发生了不同程度的扩散反应,最终形成了组织渐变的Ti/Ti3Al(Fe)//Ti2Al(Fe)/TiAl显微结构.
关键词:
TiAl金属间化合物
,
钛基合金
,
热压烧结
,
扩散反应
,
显微结构
