权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Formation of Non-Solid Soluble Type Cu-Based Amorphous Alloy and Its High Functional Properties by Nanocrystallization

非固溶型铜基非晶合金的纳米化形成及其高功能性能

基本信息

批准号：
07455272
负责人：
MASUMOTO Tsuyoshi
金额：
$ 5.38万
依托单位：
The Research Institute for Electric and Magnetic Materials (1996)Tohoku University (1995)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

项目摘要

Cu-Ag-Ln alloy system which includes above 90at% of non-solid soluble elements was amorphized. The amorphous structure, the structural change after nanocrystallized and the thermal stabiliy of ternary amorphous alloys were studied. The amorphous structure was obtained in the concentration range at 20-70 at% of Ag and 3-10 at% La in the Cu-Ag-La system, and 30-55 at% of Ag and 3-8 at% of Ce in the Cu-Ag-Ce system.It was shown in these amorphous alloys that the high crystallization temperature as 400-500K and high values of Vickers hardness, tensile strength and Young's modulus as 300,750Mpa and 120Gpa, respectively.Especially, in spite of Cu-based alloys, specific electrical resistivity is high as 0.75-0.90 mu・OMEGA・m, and the strain gauge factor was high as 2.4, reflecting higher sensitivity for stress. The crystallization process was examined by means of X-ray or electron diffraction and transmission electron microscope.In the first stage, following reaction,Am * Am + fcc Cu(Ag) + fcc Ag(Cu)* Cu + Ag + unknown Compondwas observed, and the nano order scale fine crystallite of fcc phase precipitates primarily, accompanying betterment of mechanical property as maximum value of tensile strength of 950Mpa. The activation energy obtained from the rate of the crystal growth was estimated as 130-160kJ/mol. Furthermore, by analyzing of these physical property, the imporovement of more excellent characteristics will be designed from the view point of alloy composition or heat treatment, and be tested the possibility of application to the sensor or actuator materials.As it was confirmed in the preexamination that Cu based amorphous alloys showed the peculiar property for oxidation behavior, the investigation of this field will also be spread.

Cu-Ag-Ln合金系中含有90at%以上的非固溶元素，发生了非晶化。研究了三元非晶合金的非晶结构、纳米化后的结构变化及热稳定性。在Cu-Ag-La系中，当Ag含量为20- 70at%，La含量为3- 10at%，Cu-Ag-Ce系中，当Ag含量为30- 55at%，Ce含量为3- 8at%，Cu-Ag-Ce系中，均获得了非晶结构，这些非晶合金具有较高的晶化温度（400- 500 K）和较高的维氏硬度，抗拉强度和杨氏模量分别为300、750 Mpa和120 Gpa，特别是铜基合金的比电阻率高达0.75-0.90 μ·Ω·m，应变计因子高达2.4，对应力具有较高的敏感性。用X射线衍射、电子衍射和透射电镜研究了晶化过程，在反应后的第一阶段，观察到Am * Am + fcc Cu（Ag）+ fcc Ag（Cu）* Cu + Ag +未知化合物，并初步析出了纳米级的fcc相细晶，力学性能得到改善，抗拉强度最高达950 Mpa。由晶体生长速率求得的活化能为130- 160 kJ/mol。此外，通过分析这些物理性能，从合金成分或热处理的观点设计出更优良特性的改进，并测试其应用于传感器或执行器材料的可能性。由于在预试验中确认了Cu基非晶合金显示出独特的氧化行为特性，这一领域的研究也将得到推广。