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Developmental Research on New Alloy Materials by Vapor Quenching Method

气相淬火法新型合金材料的开发研究

基本信息

批准号：
60850132
负责人：
NAKAMURA Yoji
金额：
$ 20.54万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1987
项目状态：
已结题

项目摘要

In order to develop new meterials by vapor quenching, we made several alloys by sputter deposition methods. X-ray diffraction was measured for the structure analysis and the forming ability of nonequilibrium phases was discussed. Moreover, we studied magnetic, electrical and thermal properties of these nonequilibrium alloys. The following is the results of this project in these three years.1. Types of nonequilibrium phases in vapor quenched alloys strongly correlate with the types of their equilibrium phase diagrams. The forming ability of nonequilibrium alloys by vapor quenching may be roughly estimated from the present results.2. Magnetic moments of Fe atoms in the equilibrium alloys are enlarged by shubstitution of larger size alloying elements. Nonequilibrium alloys produced by vapor quenching show very large electrical resistivitgy and the temperature coefficient of resistivity changes the sign from positive to negative around the residual resistivity of about 150 <OMEGA>cm. The c … More rystallization process of amorphous alloys is of diffusion control. Now, we are studying the electronic structure of nonequilibrium alloys by soft X-ray spectroscopy and PPS measurements.3. X-ray diffraction and EXAFS studies of amorphous Fe-Ti alloys indicate that these alloys are topologically and chemically random. Now, we are studying hydrogen absorption and desorption characteristics of amorphous Fe-Ti alloys.4. Morphology and interface oxdization of nonequilibrium alloys can be controlled by changing Ar gas pressure during sputtering. We may obtain perpendicular magnetic recording media. On the other hand, by additions of larger atomic size elements such as Pd to Fe, we may obtain soft magnetic materials with high magnetic flux density.5. In sputter deposited superconducting films, the concentration dependence of critical temperature was observed. Then, the occurence of compressive stress and the stress relief pattern of sputter deposited alloys were discussed. These results may be useful for minimizing the internal stress in superconducting thin film devices. Less

为了开发新的汽淬材料，我们采用溅射沉积的方法制备了几种合金。通过X射线衍射分析了非平衡相的结构，并讨论了非平衡相的形成能力。此外，我们还研究了这些非平衡合金的磁学、电学和热学性质。以下是该项目在这三年中取得的成果。汽淬合金中非平衡相的类型与其平衡相图的类型密切相关。根据所得结果可以粗略估计非平衡合金的汽淬成形能力.平衡态合金中Fe原子的磁矩因大尺寸合金元素的替代而增大。汽相淬火产生的非平衡合金显示出很大的电阻率，电阻率温度系数在残余电阻率约150 cm-1附近由正变负<OMEGA>。的c ...更多信息非晶合金的晶化过程是扩散控制的。目前，我们正在用软X射线谱和PPS测量研究非平衡合金的电子结构.非晶态Fe-Ti合金的X射线衍射和EXAFS研究表明，这些合金是拓扑和化学随机的。目前，我们正在研究非晶态Fe-Ti合金的吸放氢特性.非平衡合金的形貌和界面氧化可以通过改变溅射过程中的Ar气压来控制。我们可以获得垂直磁记录介质。另一方面，通过向Fe中添加较大原子尺寸的元素，如Pd，我们可以获得具有高磁通密度的软磁材料。5.在溅射沉积的超导薄膜中，观察到临界温度的浓度依赖性。讨论了溅射沉积合金中压应力的产生及应力消除方式。这些结果对减小超导薄膜器件的内应力有一定的参考价值。少