Thermal Stability of Nonequilibrium Alloys Produced by Vapor quenching

气相淬火非平衡合金的热稳定性

基本信息

批准号：
61550532
负责人：
SUMIYAMA Kenji
金额：
$ 1.22万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1986
资助国家：
日本
起止时间：
1986 至 1988
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-61550532/
关键词：
vapor quenching nonequilibrium alloy thermal stability magnetic film 新機能材料

项目摘要

In sputter-deposition process a high energy vapor solution is condenced onto a cold substate and a wide range and a wide variety of nonequilibrium alloys have been obtained. Although these nonequilibrium alloys reveal excellent magnetic and catalytic properties, they are thermally unstable. In order to improve their thermal stability we have studied effects of heat treatments on the structure and physical properties of nonequilibrium alloys: differential scanning calorimetry and measurements of X-ray diffraction patterns, magnetization and Mossbauer spectra before and after annealing in an infra-red image furnace. We have obtained the following results.(1) Nonequilibrium binary crystalline Fe-Cu and Fe-Ag alloys and ternary amorphous Fe-Cu-Ag alloys show a soft magnetic characteristic, i.e., the coercive force less than 1 oe and high magnetic flux density. However, the nonequilibrium bcc and fcc Fe-Cu and Fe-Ag alloys undergo a phase separation above 300 C, while the amorphous Fe-Cu-Ag alloys transform to bcc and fcc phases above 130 C.(2) Amorphous Fe-Ti alloys are good hydrogen storage and good hidrogen filters. Since they are thermally stable up to about 700 C, they will be used as industrial materials.(3) In nonequilibrium Fe-Pd alloys, the magnetic moment of Fe atoms are enlarged and a soft magnetic characteristic is observed, i.e., the coercive force is less than 10 Oe in the as-prepared state and it becomes about 5 Oe by annealing below 300 C. These alloys undergo a phase separation above 300 C, however, they show very interesting magnetic characteristics aFter annealing at 500 C, i.e., the coercive force is about 500 Oe and the magnetic flux density is about 18 kOe, being comparable to or getter than those of Co-Ni magnetic recording media.Now, we are studying EXAFS spectra and XPS spectra of the nonequilibrium alloys and their variation by annealing.

在溅射沉积过程中，高能蒸气溶液被限制在冷的且范围广泛的范围内，并且已经获得了多种非平衡合金。尽管这些非平衡合金显示出出色的磁性和催化特性，但它们在热不稳定中。为了提高其热稳定性，我们研究了热处理对非平衡合金的结构和物理特性的影响：差异扫描量热法和X射线衍射模式的测量，磁化和Mossbauer Spectra，磁化和Mossbauer光谱。炉。我们已经获得了以下结果。（1）非平衡二进制晶体Fe-Cu和Fe-Ag合金和三元非晶非晶Fe-Cu-Ag合金表现出柔软的磁性特性，即强制力小于1 OE和高磁性通量密度。但是，非平衡的BCC和FCC Fe-Cu和Fe-Ag合金经历300 C以上的相位分离，而无定形的Fe-Cu-Cu-Ag合金转换为BCC和FCC阶段，高于130 C（2）无定形Fe-Ti合金是良好的氢存储和良好的HIDROGON过滤器。由于它们的热稳定至约700℃，因此将用作工业材料。（3）在非平衡Fe-PD合金中，Fe原子的磁矩被扩大并观察到软磁性特性，即强制力在整理状态下的OE小于10 OE，通过退火低于300 c，这些合金在300 C以上的相距大约变为5 OE，但是，它们在500 C处退火后显示出非常有趣的磁性特性，即强制力约为500 OE，磁通量密度约为18个KOE，与Co-Ni磁性记录介质相比或获得的磁力密度可比或获得。。