Consolidation of Mechanically Alloyed Powder of Al-Ti Non-Equilibrium Phase at Low Temperature and Ultra High Pressure

Al-Ti非平衡相机械合金粉的低温超高压固结

• 批准号: 08650839
• 负责人: SAJI Shigeoki
• 金额: $ 1.41万
• 依托单位: Toyama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08650839/
• 关键词: Mechanical Allying; Al-Ti-X Alloy; Non Equilibrium Phase; Amorphous; Nano-Crystal; Consolidation at Low Temperature and Ultra High Pressure; Diffusion; Thermal Stability; 強制固溶体; 高圧・低温 固化成形

During mechanical alloying, MA,using a high energy planetary ball mill of Al-12at%Ti-X (X=Cr, Fe, Ni, Cu) mixed powders, aluminum rich Al- (10-15.8) at%Ti- (3.4-26.3) at%X supersaturated solid solution with small grain sizes of 4-6nm are obtained. Increase in the concentration of the 3rd element Cr, Fe, Ni, promotes amorphization of the aluminum rich supersaturated solid solution by MA,though no amorphous phase is formed in Al-13.lat%Ti mechanically alloyed powder. On the other hand, dissolution of about 12at%Cu in Al-11at%Ti supersaturated solid solution causes no amorphization during MA.The results obtained suggest that a critical value of the total elastic lattice strain, about 2%, due to the largely reduced lattice parameter in nano size crystals is the most important factor for the amorphization of Al-rich supersaturated solid solutions.The powder of supersaturated solid solution of Al-7.8at%Ti-0.3at%Fe with a nanocrystalline, prepared by MA,was compacted to columnar shape material at low temperature by application of high pressure of 3GPa. Diffusion of copper was studied in this compacted nanocrystalline material using and ion mass microanalyzer. The interfacial diffusion coefficient of copper in the nanocrystalline materials is fairly higher than the volume diffusion coefficient of copper in aluminum, and the activation energy of the interfacial dirrusion is quite small when compared with that of volume diffusion of copper in aluminum.

在机械合金化过程中，采用高能行星式球磨机对Al-12 at %Ti-X（X=Cr，Fe，Ni，Cu）混合粉末进行机械合金化，获得了富Al-（10-15.8）at%Ti-（3.4-26.3）at%X的过饱和固溶体，其晶粒尺寸为4- 6 nm。第三元素Cr、Fe、Ni的浓度的增加促进了富铝过饱和固溶体通过MA的非晶化，尽管Al-13.lat%Ti机械合金化粉末中没有形成非晶相。在Al-11at%Ti过饱和固溶体中，约12at%Cu的溶解不会引起非晶化。由于纳米晶中晶格常数的大幅度减小是富铝过饱和固溶体非晶化的最重要因素，制备的Al-10Al过饱和固溶体粉末采用机械合金化方法制备了7.8at%Ti-0.3at%Fe纳米晶粉末，在3GPa的高压下低温压制成柱状晶材料。利用离子质量分析仪研究了铜在这种致密纳米晶材料中的扩散.铜在纳米晶材料中的界面扩散系数远大于铜在铝中的体扩散系数，且界面扩散激活能远小于铜在铝中的体扩散激活能。

项目成果

Yoritoshi Minamino, Shigeoki Saji, Keiichi Hirao, Kenta Ogawa, Hideki Araki and Yoshinari Miyamoto: "Diffusion of Copper in Nanocrystalline Al-7.8at%Ti-0.3at%Fe Alloy Prepared by Mechanical Alloying" Materials Transactions, JIM. Vol.37, No.2. 130-137 (199

赖俊%20南野、%20茂兴%20佐治、%20启一%20平尾、%20健太%20小川、%20英树%20荒木%20和%20吉成%20宫本:%20"扩散%20of%20铜%20in%20纳米晶%20Al-7.8at%Ti-

Shigeoki Saji, Hideki Araki, Kazuya Hashimoto and Eiji Murata: "Amorphization of Al-12at%Ti-X (X=Cr, Fe, Ni, Cu) Mixed Powders by Mechanical Alloying" Materials Transactions, JIM. Vol.37, No.5. 1061-1066 (1996)

茂兴%20佐治、%20英树%20荒木、%20和也%20桥本%20和%20英二%20村田:%20"非晶化%20of%20Al-12at%Ti-X%20(X=Cr,%20Fe,%20Ni,%20Cu)

Yoritoshi Minamino: "Diffusion of Copper in Nanocrystalline Al-7.8at%Ti-0.3at% Fe Alloy Prepared by Mechanical Alloying" Materials Transactions, JIM. 37・2. 130-137 (1996)

Yoritoshi Minamino：“通过机械合金化制备的纳米晶 Al-7.8at%Ti-0.3at% Fe 合金中的铜扩散”，材料交易，JIM 37・2 (1996)。

佐治重興: "メカニカルアロイングにより作製したAl-Ti合金の非平衡組織の熱的安定性" 軽金属. (発表予定).

Shigeoki Saji：“机械合金化制备的 Al-Ti 合金的非平衡结构的热稳定性”轻金属（演示文稿预定）。

Yoritoshi Menamino: "Diffusion of Copper in Nanocrystalline Al-7.8at%Ti-0.3at%Fe Alloy Prepared by Mechanical Alloying" Materials Transactions,JIM. 37・2. 130-137 (1996)

Yoritoshi Menamino：“通过机械合金化制备的纳米晶 Al-7.8at%Ti-0.3at%Fe 合金中的铜扩散”，材料交易，JIM 37・2 (1996)。