The effects of material attributes on powder–binder separation phenomena in powder injection molding
The effects of material attributes on powder–binder separation phenomena in powder injection molding
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DOI：
10.1016/j.powtec.2013.03.037
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发表时间：
2013-07
影响因子：
5.2
通讯作者：
T. Shivashankar;R. Enneti;S. Park;R. German;S. Atre
中科院分区：
文献类型：
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作者：
T. Shivashankar;R. Enneti;S. Park;R. German;S. Atre
粉末注射成型（PIM）中使用的粉末-粘合剂混合物（原料）的组成在制造无缺陷部件中起着至关重要的作用。在混合或成型过程中原料中的粉末-粘合剂分离是导致烧结部件中的缺陷如空隙、裂纹或变形的原因。本研究引入了基于颗粒尺寸（D）、颗粒体积分数（μ m）和最大颗粒分数（μ m）的颗粒间间距参数δ。派生的参数进行了研究，使用从三种不同的金属粉末制备的原料。基于与本研究的实验数据以及文献报道的比较，颗粒间间距参数δ被证明是粉末-粘合剂分离的有用预测因子。新提出的参数有助于设计和开发原料，通过PIM制造组件。
The composition of the powder–binder mixture (feedstock) used in powder injection molding (PIM) plays a crucial role in fabricating defect-free parts. Powder–binder separation in the feedstock during mixing or molding is responsible for defects such as voids, cracks, or distortion in the sintered part. This study introduces an inter-particle spacing parameter, δ, based on particle size (D), particle volume fraction (ϕ) and maximum particle fraction (ϕm). The derived parameter is investigated using feedstocks prepared from three different metal powders. Based on comparisons with experimental data from this study as well as reports in the literature, the inter-particle spacing parameter, δ, proves to be a useful predictor of powder–binder separation. The newly proposed parameter assists in designing and developing feedstocks to manufacture components by PIM.