Investigation of microstructural evolution of gas-assisted metal injection molded and sintered Mg-0.5Ca alloy

IF 1.4 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS Science of Sintering Pub Date : 2022-01-01 DOI:10.2298/sos2201025c

B. Cicek, Yavuz Sun, Y. Turen, H. Ahlatçı

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引用次数: 4

Abstract

In this study, Mg-0.5Ca alloy was produced in a newly designed unit during the metal injection molding process. 40?mD90 Mg powder and 500nmD90 Ca powder were used in accordance with injection molding and powder sintering rules. In the injection phase, Polyethylene-glycol (PEG) and Poly-methyl-methacrylate (PMMA) and stearic acid (SA) polymers act as binders and lubricants. In the experimental phase, X-ray Diffractometer (XRD), Thermal Gravimetric Analyze (TGA), Scanning Electron Microscope (SEM) equipped with Energy Dispersive Spectroscopy Mapping (EDS and MAP), and Vickers microhardness (HV) examinations were performed. The samples produced were subjected to the sintering process at different temperatures and times. Conventional powder sinter stages point, neck, and joining structures were obtained at different temperatures and durations. As a result, it was determined that Mg-0.5Ca alloy reached a metallic form with the specified polymer structure only at 600oC temperature and after 5 h sintering. Grain boundaries were formed in the sintered sample and the presence of the Mg2Ca phase was observed. The hardness of the metallic structure obtained was measured as 49.9 HV0.1 on average.

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Mg-0.5Ca合金气辅注射成型烧结组织演变研究

在本研究中，Mg-0.5Ca合金在金属注射成型过程中在新设计的单元中生产。40吗?采用mD90 Mg粉末和500nmD90 Ca粉末，按注塑和粉末烧结规程进行。在注射阶段，聚乙二醇(PEG)、聚甲基丙烯酸甲酯(PMMA)和硬脂酸(SA)聚合物作为粘合剂和润滑剂。实验阶段采用x射线衍射仪(XRD)、热重分析仪(TGA)、能谱能谱仪(EDS和MAP)扫描电镜(SEM)和维氏显微硬度(HV)测试。制备的样品在不同的温度和时间下进行烧结。在不同的温度和时间下，获得了常规粉末烧结阶段的点、颈和连接结构。结果表明，Mg-0.5Ca合金在600℃的温度下烧结5h后才达到具有规定聚合物结构的金属形态。烧结试样中形成了晶界，并观察到Mg2Ca相的存在。得到的金属组织硬度平均为49.9 HV0.1。

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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.