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A NEW COMPOSITE FUNCTIONAL MATERIAL・ DEVELOPMENT OF MAGNETIC SHAPE MEMORY ALLOY

新型复合功能材料·磁性形状记忆合金的开发

基本信息

批准号：
10650697
负责人：
KANADA Tsugunori
金额：
$ 1.86万
依托单位：
OITA NATIONAL COLLEGE OF TECHNOLOGY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650697/
关键词：
Shape memory effect Shape memory alloy Magnetite Oxidation Heat treatment Slant type SMA Sheet Ribbon 応力誘起型マルテンサイト

项目摘要

We contrived a new composite functional alloy which is compatible both the magnetization and shape memory effect (SME). An Fe-Mn-Si-Cr alloy, one of the shape memory alloys (SMA) has an antiferromagnetism, so has a slight magnetization originally, but it becomes to have strong magnetization in addition to SME after heating in the air. It is because the specimen is composed of a ferromagnetic iron oxide FeィイD23ィエD2OィイD24ィエD2 (magnetite) surface layer and inner SMA layer which is not affected by oxidation heat treatment. The measurement was carried on the sheet, ribbon, wire and ring specimen and discussed. Totally we could present 18 papers including 4 magazines and one patent fruitfully.As the results, it is made clear that the oxidation surface layer which has magnetization depends largely on the type of specimen. Originally an Fe based SMA can not be processed easily by cold roll, therefore it did not show good SME. This problem is improved by producing ribbon specimen using rapid quench method. These results leads to following study, since SME depends on heat treatment condition, so we contrived a slant type SMA which has different SME along to longitudinal specimen length using partial heat treatment by turns. This result was applied for a patent.As a succeeding step, without heat treatment, so without iron oxide, a new material which has both the magnetization and SME originally is expected to be discovered soon. This is realistic because that some Fe based SMA are composed of ferromagnetic chemical elements. Another target is a material which has Curie point, 100℃ around. This material enables two steps transformations, temperature and magnetism.

我们设计了一种兼有磁化和形状记忆效应的新型复合功能合金。形状记忆合金(SMA)中的一种Fe-Mn-Si-Cr合金具有反铁磁性，在空气中加热后除了SME外，还具有较强的磁化强度。这是因为样品由铁磁性氧化铁Fe-ィイ-D23-ィエ-D2O-ィイ-D24-ィエ-D2(磁铁矿)表层和内层形状记忆合金层组成，不受氧化热处理的影响。对片状、带状、线状和环形试件进行了测量，并进行了讨论。总共发表了18篇论文，其中包括4本杂志和1项专利。结果表明，具有磁化作用的氧化表面层在很大程度上取决于样品的类型。原来铁基形状记忆合金不容易冷轧加工，因此没有表现出良好的形状记忆效应。通过采用快速淬火方法制作带状试件，改善了这一问题。由于SME依赖于热处理条件，因此我们设计了一种沿纵向试件长度方向具有不同SME的倾斜型形状记忆合金，采用局部热处理的方法。这一结果申请了专利。作为后续的一步，不需要热处理，所以不需要氧化铁，一种原本具有磁化和SME的新材料有望很快被发现。这是现实的，因为一些铁基SMA是由铁磁化学元素组成的。另一个目标是一种居里点在100℃附近的材料。这种材料实现了温度和磁性两个步骤的转变。