贺永东,曾慧楠,邢诗雨,李鹏,何蕾,赵毕文,李琛,张媛庆.氢化钛-石墨制备Al-Ti-C母合金机理与组织性能研究[J].稀有金属材料与工程,2019,48(4):1345~1351.[heyongdong,zenghuinan,xingshiyu,lipeng,helei,zhaobiwen,lichen,zhangyuanqing.Mechanism and microstructure properties of Al-Ti-C mother alloy prepared by titanium hydride-graphite[J].Rare Metal Materials and Engineering,2019,48(4):1345~1351.]
氢化钛-石墨制备Al-Ti-C母合金机理与组织性能研究
投稿时间:2017-12-28  修订日期:2018-01-17
中文关键词:  氢化钛  石墨  冰晶石  枝晶组织  Al-Ti-C母合金
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目),新疆维吾尔自治区科技厅高技术发展计划项目
中文摘要:
      采用扫描电子显微镜(SEM)、能谱仪(EDS)、X射线衍射(XRD)等研究了由氢化钛-石墨法制备的Al-Ti-C母合金的组织性能。结果表明:由氢化钛-石墨与铝液反应制备Al-Ti-C母合金的机理是由氢化钛、石墨分别作为钛源、碳源,氢化钛受热分解为钛和氢,钛与铝、石墨反应生成钛铝、钛碳或者铝碳化合物。由铝钛化合物、碳铝化合物、钛碳化合物组成具有细化作用的Al-Ti-C母合金。合金的物相组成包括:α(Al)、铝钛、碳铝、钛碳化合物等物相,金相为等轴晶或者树枝晶组织,平均晶粒尺寸20~40μm。合金基体中存在针状、棒状的初晶相,晶界上存在含钛、碳、铁、硅的花瓣状初晶,钛、碳组元沿晶界、晶内分布大体均匀,在初晶相附近存在明显的钛、碳富集、偏聚现象。冰晶石有利于碳与铝润湿、反应,生成的第二相在晶内扩散更充分、分布也更均匀。
Mechanism and microstructure properties of Al-Ti-C mother alloy prepared by titanium hydride-graphite
英文关键词:titanium hydride  graphite  cryolite  dendritic structure  Al-Ti-C mother alloy
英文摘要:
      The microstructure and properties of Al-Ti-C master alloy prepared by titanium hydride and graphite were studied by X ray diffraction (XRD)、scanning electron microscope (SEM) and energy dispersive spectrometer (EDS).The results show that the mechanism of Al-Ti-C alloy prepared by the reaction of titanium hydride-graphite and aluminum liquid is that (1) Titanium hydride and graphite are respectively used as titanium and carbon sources, and titanium and hydrogen are obtained by thermal decomposition of titanium hydride.(2)Titanium react with aluminum and graphite to form titanium-aluminum、titanium-carbon or carbon-aluminum compounds.(3) Titanium aluminum, carbon aluminum and titanium carbon compounds have refined Al-Ti-C alloy.The phase composition of the alloy includes α(Al), Ti-Al,C-Al, Ti-C compounds and other phases. The microscopic structure is equiaxed or dendrite structure, and the average grain size is 20~40μm.There are needle like or rod like primary crystals in the alloy matrix. There are petal like primary crystals containing titanium, carbon, iron and silicon on the grain boundaries. The titanium and carbon elements distribute evenly along the grain boundaries and the grains. There is obvious titanium and carbon enrichment and segregation near the primary phase.Cryolite is conducive to the wetting and reaction of carbon and aluminum, the second phase generated more fully and uniform diffusion in the grain.
作者单位E-mail
贺永东 新疆大学 hydongq@126.com 
曾慧楠 新疆大学 zenghuinan0824@163.com 
邢诗雨 新疆大学  
李鹏 新疆大学  
何蕾 新疆大学  
赵毕文 金川集团有限责任公司  
李琛 金川集团有限责任公司  
张媛庆 金川集团有限责任公司  
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