Study on Phase Transformations for New Materials and under Special Conditions

研究了非晶态合金、沸石团簇等新材料在各种特殊环境下的相变特征。大约80%的初始项目飞机是成功完成的。这项研究针对的是三名受试者。主要结果如下：(1)从实验和理论两方面探讨了软磁材料在特定条件下的相变过程；HONO博士在原子尺度上研究了纳米复合型软磁材料相变的初始阶段，证明了铜、Nb等杂质对软磁性能的影响，提出了制备新型软磁材料的新概念。TERASAKI博士用X射线衍射和电子显微镜相结合的方法研究了各种沸石的晶体结构，并提出了通过控制微细观空间结构来制备新型材料的新概念。(2)材料特性…S博士研究了各种含铁元素的多层膜的磁性，并提出了一个解释亚稳态面心立方和体心立方铁相稳定性的新模型。NITTONO博士研究了各种从热力学上难以形成的亚稳相，并证明了在等离子体状态下，通过溅射可以很容易地制备各种亚稳相和合金，各种类型的相变适用于实际材料的改进。(3)非晶态芦荟和准晶相变的非晶-晶型分析INO博士研究了含Sm的非晶态合金的磁性，并从温度的角度成功地解释了磁相变的机理。HIROTSU博士将电子衍射、径向分布分析和结构模拟方法相结合，发展了非晶态合金的新型分析技术，并应用于非晶态软磁材料的微观结构分析。一些研究人员还相互合作，阐明了相分离初始阶段的机制。本研究还获得了许多新的知识，具有一定的实用性和实用性。较少

The characteristics of phase transformations have been invsestigated for new materials such as amorphous alloys and zeolite clusters, and also under various specific circumstances. About 80% of initial project planes was done in successfully. The study was done for three subjects. Main results are as follows : (1) Experimental and theoretical appoaches for understanding of phase transformations under specific circumstances ; Dr.HONO studied initial stages of phase transformations in nano-composite types of soft magnetic materials in atomic scale, and demonstrtaed that some impurities such as copper and niobium play an important role for soft magnetic properties and proposed a new concept to fabricate new types of soft materials. Dr.TERASAKI examined crystal structures in various zeolites by a combination of X-ray diffraction and electron microscopy, and also demostrated a new concept to fabricate new types of materials by controlling micro-meso spacial structures. (2)Material propertie … More s in artificially fabricated materials such as multilayers and metastable phases ; Dr.MATSUI examined the magnetic properties of arificial multilayer films containing iron element, and proposed a new model to explain the phase stability of metastable fcc and bcc iron phases. Dr.NITTONO examined various metastable phases which are hard to be formed thermodymanically, and demostrated that various metastable phases and alloys are easily fabricated under plasma states by sputtering, and various types of phase transformations are applicable to the improvement of practical materials. (3)Analysis of non-crystal to crystal types of phase transformations in amorphous alooys and quaisi-crystals ; Dr.INO examined magnetic properties of amorphous alloys containing Sm element, and explained successfully the mechanism of magmetic transformation in terms of temperature. Dr.HIROTSU developped new types of analytical techniques for amorphous alloys by the combination of electron diffraction, radial distribution analysis and structursl simulation method, and applied to the analysis of microstructures in amorphous soft magnetic materials. Some of researchers also collaborated with each other to elucidate the mechanism of the initial stage of phase separation. A lot of new knowledges which are applicable and useful were also obtained from this study. Less