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首页> 外文期刊>Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems >Analysis of rheological behaviour of titanium feedstocks formulated with a water-soluble binder system for powder injection moulding
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Analysis of rheological behaviour of titanium feedstocks formulated with a water-soluble binder system for powder injection moulding

机译：用水溶性粘合剂体系配制的钛原料的流变行为分析，用于粉末注射成型

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Binder selection and formulation are critical in powder injection moulding. Binders play a key role in controlling the rheological properties of a feedstock and influence whether the resulting feedstock can be successfully injection moulded, debound and sintered without defects. A four-step process was used to mix hydride-dehydride titanium alloy (processed) powder (Ti-6Al-4V) with a polyethylene glycol (PEG) based water soluble binder system. The rheological properties, including flow behaviour index, flow activation energy, fluidity and melt flow index of the homogeneous feedstock, were determined with a capillary rheometer. All feedstock formulations exhibited shear thinning flow behaviour. The optimum feedstock consisting of 60 vol.% powder content, 32 vol.% PEG, 6 vol.% polyvinyl butyryl and 2 vol.% stearic acid was suitable for titanium injection moulding. (C) 2014 Elsevier B.V. All rights reserved.
机译：粘合剂的选择和配方对于粉末注射成型至关重要。粘合剂在控制原料的流变性中起着关键作用，并影响所得原料是否可以成功地注塑，脱脂和烧结而没有缺陷。使用四步过程将氢化物-脱水钛合金粉末（Ti-6Al-4V）与基于聚乙二醇（PEG）的水溶性粘合剂体系混合。用毛细管流变仪测定流变性质，包括均相原料的流动行为指数，流动活化能，流动性和熔体流动指数。所有原料配方均表现出剪切稀化流动行为。由60％（体积）的粉末含量，32％（体积）的PEG，6％（体积）的聚乙烯丁酰和2％（体积）的硬脂酸组成的最佳原料适用于钛注射成型。 （C）2014 Elsevier B.V.保留所有权利。

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