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Study on the Production of Amorphous Alloy Powders with Very Thin and Large Aspect Rations by a Two-Stage Quenching Method

两级淬火法生产极薄大长径比非晶合金粉末的研究

基本信息

批准号：
03555147
负责人：
INOUE Akihisa
金额：
$ 10.62万
依托单位：
Institute for Material Research
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1993
项目状态：
已结题

项目摘要

In 1991, we constructed a two-stage rapid quenching equipment and determined appropriate conditions for the production of flaky amorphous powders with very thin thickness in Fe-, Co- and Ni-based alloys. Furthermore, we examined fundamental properties of thermal stability, corrosion resistance and magnetic properties for the flaky amorphous powders and clarified that the flaky amorphous powders have unique characteristics which were different from those for amorphous sheets and wires.In 1992, we searched alloy systems and alloy compositions in which a large glass-forming ability leading to the formation of flaky amorphous powders is achieved in refractory Ti- and Zr-based alloy systems. Subsequetly, the production of flaky amorphous powders was tried for the above-described alloys and the most appropriate atomizing conditions were determined. We also examined the morphology, thermal stability and corrosion resistance of the flaky powders.and investigated the relation between the proper … More ties and the preparation process of the flaky amorphous powders in their refractory metal base alloys.In 1993, the production of flaky amorphous powders was tried for Al-based alloys where the exfoliation of the powder from the rotating roter is difficult because of their low specfic weight and the production of the flaky amorphous powder is difficult. As a result, it was found that the modification of the surface state of the rotating roter enables a high production ratio of Al-based flaky amorphous powders. As similar for the Fe-, Co-, Ni-, Ti- and Zr-based amorphous powders with flaky morphology, the Al-based flaky powders also have the heat of structural relaxation which is about two times as large as those for the amorphous ribbons, indicating that the amorphous powders were produced at very large cooling rates.In addition, we evaluated the characteristics of the Fe- and Co-based flaky amorphous powders as magnetic shielding materials as well as the Ti- and Al-based flaky amorphous powders as corrosion resistanct painting materials. As a result, it was confirmed that the flaky amorphous powders in Fe, Co, Ti and Al based systems produced by the two-stage quenching technique have the characteristics which are good enough to use practically as magnetic shielding and corrosion resistant painting materials because of their extremely thin form and their unique amorphous structure. Less

1991年，我们建造了一台两段式快淬设备，确定了在Fe基、Co基和Ni基合金中制备厚度很薄的非晶粉末的适当条件。此外，我们还研究了非晶粉末的热稳定性、耐腐蚀性和磁性能等基本性质，并阐明了非晶粉末具有不同于非晶片材和线材的独特特性。我们研究了合金系统和合金组合物，其中大的玻璃-在难熔的Ti-和Zr-基合金体系中实现了导致形成无定形粉末的成形能力。随后，对上述合金进行了雾化非晶粉末的制备试验，并确定了最合适的雾化条件。对粉体的形貌、热稳定性和耐蚀性进行了研究，并探讨了合适的工艺参数与粉体性能的关系 ...更多信息 1993年，对铝基合金进行了非晶粉末的制备试验，由于铝基合金的比重低，粉末从转子上剥离困难，非晶粉末的制备困难。结果，发现旋转转子的表面状态的改性能够实现Al基非晶粉末的高生产率。与Fe、Co、Ni、Ti和Zr基非晶粉末相似，Al基非晶粉末的结构弛豫热约为非晶薄带的2倍，表明非晶粉末是在很大的冷却速率下形成的。评价了铁基和钴基非晶磁屏蔽材料以及钛基和铝基非晶耐蚀涂层材料的性能。结果表明，用两段淬火法制备的Fe、Co、Ti和Al系非晶粉末，由于其极薄的形状和独特的非晶结构，具有良好的磁屏蔽和耐蚀涂料的性能。少