Study of the Super-Strongest Materials Consisting of Al- or Mg- base Fine Structure Dispersed by Nanoscale Complete Crystalline Particles

纳米级完整晶粒分散铝基、镁基精细结构超强材料研究

• 批准号: 07555210
• 负责人: MASUMOTO Tsuyoshi
• 金额: $ 15.36万
• 依托单位: The Research Institute for Electric and Magnetic Materials (1996-1997)Tohoku University (1995)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555210/
• 关键词: Aluminum alloy; Magnesium alloy; Non-equilibrium; Nano-particle; Powder; Extrusion; Tensile strength; Hardness; 疲労強度; ナノ結晶; 分散強化合金; アルミニウム基合金; マグネシウム基合金; 高比強度; バルク化

In order to obtain a new type nonmagnetic light alloy with high specific strength which exceeds them of the usual commercial alloys, the research development of amorphous material containing nanocrystalline grains were performed.As a results, by means of two-stage quenching technique consisting of high-pressure gas atomization followed by centrifugal spinning, a double phase amorphous powders consisting of [(fcc-Al or hcp-Mg) + (Amorphous-Al or -Mg)] were obtained. After short time rapid heating at 573-623k, the powders were extruded at that temperatures. The extruded bulk alloy exhibits higer tensile strength of 2.5 times of extra-super duralmin. It is cleared that these high strength is appeared by the interactions of three conditions as follows ;(1) nanoscale fcc-Al or hcp-Mg particles have complete crystalline state,(2) the interface between amorphous and fcc-Al or hcp-Mg paticles have highly close-packed interface structure which prevents the crack growth,(3) nanoscale fcc-Al or hcp-Mg particles with the size of 3-5nm forms the atomic cluster with 10-20nm thick which suppress effectively an inhomogeneous deformation of amorphous alloys.The extruded amorphous alloys are suitable for the parts materials of vehicles, mechanical structures, mechanical slidings or springs.

为了获得一种比强度超过普通工业合金的新型非磁性轻合金，开展了含纳米晶粒非晶材料的研究开发工作。采用高压气体雾化-离心纺丝两段淬火技术，制得[(fcc-Al或hcp-Mg) + (amorphus - al或-Mg)]双相非晶粉体。在573-623k短时间快速加热后，粉末在该温度下被挤出。挤压体合金的抗拉强度是超硬铝的2.5倍。这些高强度是由以下三个条件的相互作用而产生的；(1)纳米级fcc-Al或hcp-Mg颗粒具有完整的晶态；(2)非晶与fcc-Al或hcp-Mg颗粒之间的界面具有高度密实排列的界面结构，阻止了裂纹的扩展；(3)尺寸为3-5nm的纳米级fcc-Al或hcp-Mg颗粒形成了10-20nm厚的原子团簇，有效地抑制了非晶合金的不均匀变形。挤压非晶合金适用于汽车、机械结构、机械滑轨或弹簧等零部件材料。

项目成果

T.H.Lee: "Mechanical Properties of Rapidly Soldified Al-Si-Ni-Ce P/M Alloys" Scripta Materialia. 36-4. 475-480 (1997)

T.H.Lee：“快速凝固的 Al-Si-Ni-Ce P/M 合金的机械性能”Scripta Materialia。

A. Kato: "Consolididation and Their Mechanical Properties of Amorphous Mg_<87.5>Cu_5Y_<7.5> and Mg_<70>Ca_<10>Al_<20> Powders by High Prssure Gas Atomization" Materials Transactions, JIM. 36. 977-981 (1995)

A. Kato：“高压气体雾化非晶态 Mg_<87.5>Cu_5Y_<7.5> 和 Mg_<70>Ca_<10>Al_<20> 粉末的固结及其机械性能”Materials Transactions，JIM。

Y. H. Kim: "Ultrahigh Mechanical Strength of an Amorphous Al_<88>Ni_<10>Nd_2 Alloy Containing Al Nanoparticles at Room and Elevated Temperatures" Advanced Materials and Processing. 3. 2163-2166 (1995)

Y. H. Kim：“含 Al 纳米颗粒的非晶 Al_<88>Ni_<10>Nd_2 合金在室温和高温下的超高机械强度”先进材料与加工。

Y.Kawamura: "Effects of Extrusion Conditions on Mechanical Properties in Zr-Al-Ni-Cu Glassy Powder Compacts" Materials Science and Engineering. A219. 39-43 (1996)

Y.Kawamura：“挤出条件对 Zr-Al-Ni-Cu 玻璃状粉末压块机械性能的影响”材料科学与工程。

K.Kita: "Mechanical Properties of Al Based Alloys Containing Quasi-Crystalline Phase as a main Coomponent" Materials Science and Engineering. A226-228. 1004-1007 (1997)

K.Kita：“以准晶相为主要成分的铝基合金的力学性能”材料科学与工程。