Properties and Rheological Behavior of Nano-Sized Cemented Carbide Injection Molding Feedstocks with Different Percentages of Grain Growth Inhibitor

Q3 Engineering International Journal of Mechanical Engineering and Robotics Research Pub Date : 2023-01-01 DOI:10.18178/ijmerr.7.4.338-342

Prathabrao Muniandy, S. Amin, M. Ibrahim

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Abstract

— A homogenous distribution of powder particles and binders in metal injection molding (MIM) feedstock, and good flowability, are important characteristics as these help to reduce powder-binder separation and achieve isotropic reduction after sintering. To avoid problems in these areas, this paper focuses on determining feedstock properties and studying the effect of TaC powder as a grain growth inhibitor on the rheological behavior of MIM feedstock. A raw material of WC-6%Co, together with palm stearin and a polyethylene binder system, was used as feedstock, tailored with different TaC loadings of 0.4%, 0.8%, and 1.2% by weight. The homogenous feedstock, mixed by ball milling and with a Brabender mixer, was subjected to rheology testing at different temperatures. The results indicated that all feedstock formulations exhibited good pseudoplastic behavior within acceptable ranges in MIM, with a TaC content of 0.8 wt% giving the optimum rheological properties. 

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不同晶粒生长抑制剂含量对纳米硬质合金注射料性能及流变行为的影响

-粉末颗粒和粘结剂在金属注射成型(MIM)原料中的均匀分布以及良好的流动性是重要的特性，因为这些有助于减少粉末-粘结剂分离并在烧结后实现各向同性还原。为了避免这些方面的问题，本文重点研究了原料性能的确定以及TaC粉作为晶粒生长抑制剂对MIM原料流变行为的影响。以WC-6%Co为原料，棕榈硬脂和聚乙烯粘结剂体系为原料，根据TaC的重量比例分别为0.4%、0.8%和1.2%。均匀的原料，通过球磨和Brabender混合器混合，在不同的温度下进行流变试验。结果表明，在可接受的范围内，所有原料配方在MIM中表现出良好的假塑性行为，TaC含量为0.8 wt%时具有最佳的流变性能。

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来源期刊

International Journal of Mechanical Engineering and Robotics Research Engineering-Mechanical Engineering

CiteScore

2.80

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0.00%

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期刊介绍： International Journal of Mechanical Engineering and Robotics Research. IJMERR is a scholarly peer-reviewed international scientific journal published bimonthly, focusing on theories, systems, methods, algorithms and applications in mechanical engineering and robotics. It provides a high profile, leading edge forum for academic researchers, industrial professionals, engineers, consultants, managers, educators and policy makers working in the field to contribute and disseminate innovative new work on Mechanical Engineering and Robotics Research.