Structural features of near equiatomic FeCo-2V semi-hard magnetic alloy prepared by MIM technology

IF 1.4 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Science of Sintering Pub Date : 2023-01-01 DOI:10.2298/sos231024055n

Borivoje Nedeljkovic, Vladimir Pavlovic, Nina Obradovic, Nebojsa Mitrovic

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Abstract

The structural properties of a magnetically semi-hard near equiatomic FeCo-2wt%V (FeCoV) alloy produced by Powder Injection Moulding (PIM) (option by fine metal powder - Metal Injection Moulding (MIM) technology) were investigated in this paper. Starting granulate was prepared by mixing FeCoV powder with a low-viscosity binder. After injection, the green samples were first treated with a solvent and then thermally with the same aim of removing the binder. MIM technology was completed by high-temperature sintering for 3.5 hours at temperatures from 1370 OC to 1460 OC in a hydrogen atmosphere, which provides the necessary magnetic and mechanical characteristics. The influence of sintering temperature was investigated concerning the aspects of the processes of structural transformation by the methods of X-ray diffraction (XRD) and scanning electron microscopy (SEM). The appearance of an intense diffraction peak of the ?'-FeCo phase (crystal structure type B2) was registered for all investigated samples. Structural parameters particle size Dmax, Feret X, and Feret Y exhibit constant increase with increase of sintering temperature.

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MIM工艺制备近等原子FeCo-2V半硬磁合金的结构特征

研究了粉末注射成型(PIM)制备的近等原子FeCo-2wt%V (FeCoV)半硬合金的组织性能。将FeCoV粉与低粘度粘结剂混合制备起始颗粒。注射后，绿色样品首先用溶剂处理，然后热处理，目的是去除粘合剂。MIM技术是通过在1370 ~ 1460℃的氢气气氛中进行3.5小时的高温烧结完成的，这提供了必要的磁性和机械特性。采用x射线衍射(XRD)和扫描电子显微镜(SEM)研究了烧结温度对结构转变过程的影响。在所有样品中都发现了-FeCo相(B2型晶体结构)的强烈衍射峰。随着烧结温度的升高，结构参数粒径Dmax、feet X和feet Y呈不断增大的趋势。

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来源期刊

Science of Sintering 工程技术-材料科学：硅酸盐

CiteScore

2.50

自引率

46.70%

发文量

审稿时长

3.3 months

期刊介绍： Science of Sintering is a unique journal in the field of science and technology of sintering. Science of Sintering publishes papers on all aspects of theoretical and experimental studies, which can contribute to the better understanding of the behavior of powders and similar materials during consolidation processes. Emphasis is laid on those aspects of the science of materials that are concerned with the thermodynamics, kinetics and mechanism of sintering and related processes. In accordance with the significance of disperse materials for the sintering technology, papers dealing with the question of ultradisperse powders, tribochemical activation and catalysis are also published. Science of Sintering journal is published four times a year. Types of contribution: Original research papers, Review articles, Letters to Editor, Book reviews.