Development of High Performance Metallic Materials through Nano-crystalline Structure Control

通过纳米晶结构控制开发高性能金属材料

• 批准号: 06044019
• 负责人: FUJIIMORI Hiroyasu
• 金额: $ 3.46万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06044019/
• 关键词: High Strength Al Base Alloy; High Temperature Nb_3 Al Compound; Nano-crystalline Material; Structural Control; High Mechanical Strength; Ductility; Soft Magnet; Hard Magnet; 新素材; アモルファス; 人口格子; 強強度アルミ合金; ナノ組織制御; 強靭性; 超強度; メカニカル グライディング; 液体超

We investigated the effect of nano-crystalline structural control on mechanical, magnetic and electrical properties of various types of metallic materials. The results obtained are as follows :1) The methods for nano-crystalline structural control : The methods ; a mechanical alloying followed by consolidation by HIP for Nb_3 Al based nano-crystalline intermetallic compounds, a crystallization of amorphous metal followed by consolidation for Al based nano-crystalline bulk alloys, a N or O reactive sputtering for Fe based nano-crystalline or granular alloys thin films, were investigated, respectively. The alloy compositions were also investigated. Through these investigations, the following properties were obtained.2) Nb_3 Al based nano-crystalline intermetallic compounds : Mechanically very strong and ductile properties, typical in about 60% elongation, were obtained.3) Al based nano-crystalline bulk alloys : A nano-crystalline bulk Material of Al_<92>Mn_6Ce_2 Al_<94.5>Cr_3Ce_1Co_<1.5> and a nano-structurally mixed amorphous-crystalline bulk material of Al_<94>V_4Fe_2 were found to show mechanically very strong and ductile properties. In addition, a strong effect of rare earth elements on the formation of nano-crystalline state was found in the Al-Si based alloys.4) Fe based nanocrystalline magnetic alloys : It was found to show high magnetic flux density and high permeability in nano-crystalline thin Fe- (Hf, Zr, Nb) -C-N alloys, high electrical resistivity and giant magnetoresistace in metal-insulator nano-granular thin films of a Fe-MgO system, high coercivity in structurally nano-columnar FeNdB/Cr multilayred thin films, and permanent magnetic properties with high magnetic flux density in nano-crystalline bulk materials of Fe-Nd-B alloys.

我们研究了纳米晶结构控制对各种类型金属材料的机械、磁性和电学性能的影响。1）纳米晶结构控制方法：分别研究了Nb_3Al基纳米晶金属间化合物的机械合金化+热等静压（HIP）方法、Al基纳米晶块体合金的非晶金属晶化+热等静压方法、Fe基纳米晶或颗粒状合金薄膜的N或O反应溅射方法。还研究了合金成分。3）Al基纳米晶块体合金：Al_Mn_6Ce_2Al_ Cr_3Ce_1Co_（1-x）纳米晶块体材料<92><94.5><1.5>和Al_ V_4Fe_2纳米晶-非晶混合块体材料<94>表现出很强的力学性能和延展性。此外，在Al-Si基合金中发现稀土元素对纳米晶的形成有很强的影响。4）Fe基纳米晶磁性合金：结果表明，纳米晶薄Fe-100具有高的磁通密度和高的磁导率。（Hf，Zr，Nb）-C-N合金，Fe-MgO系金属-绝缘体纳米颗粒薄膜中的高电阻率和巨磁阻，在纳米柱状结构的FeNdB/Cr多层薄膜中具有高矫顽力，在纳米晶Fe-Nd-B合金块体材料中具有高磁通密度的永磁性能。

项目成果

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T.Wada：“Nb_3Al/Nb合金的高温变形”材料科学论坛。