Debinding behaviour of a water soluble PEG/PMMA binder for Ti metal injection moulding
Debinding behaviour of a water soluble PEG/PMMA binder for Ti metal injection moulding
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DOI：
10.1016/j.matchemphys.2013.01.057
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发表时间：
2013-05-15
影响因子：
4.6
通讯作者：
Edmonds, Neil
中科院分区：
文献类型：
--
作者：
Chen, Gang;Cao, Peng;Edmonds, Neil
聚乙二醇 (PEG) 已成为金属注射成型水溶性粘合剂系统设计中的常见成分。与溶剂脱脂类似，PEG 可以被水浸出，并且文献中提出了脱脂机制，其中关于脱脂机制的信息有些误导，特别是关于 PEG 凝胶的形成。这项工作研究了基于 PEG 的粘合剂在钛压坯中的脱脂行为。钛粉由PEG、聚甲基丙烯酸甲酯(PMMA)和硬脂酸(SA)配制而成，配制钛原料。为了确定脱脂动力学，在三种不同的温度和不同的样品厚度下测量了 PEG 去除百分比。建立了基于扩散控制脱脂过程的数学模型。使用扫描电子显微镜观察水脱脂过程中多孔微观结构的演变。基于这些观察，提出了一种使用 PEG 基粘合剂配制的钛合金压块的水脱脂机制。 (C) 2013 Elsevier B.V. 保留所有权利。
Polyethylene glycol (PEG) has been becoming a common component in the design of water soluble binder systems for metal injection moulding. Similar to solvent debinding, PEG can be leached out by water and the mechanism of debinding was proposed in the literature with somehow misleading information about the debinding mechanism, particularly about the formation of PEG gel. This work investigates the debinding behaviours of a PEG-based binder in titanium compacts. Titanium powder is formulated with PEG, poly(methyl methacrylate) (PMMA) and stearic acid (SA) to formulate titanium feedstock. To determine the debinding kinetics, the PEG removal percentages are measured at three different temperatures and for various specimen thicknesses. A mathematic model based on diffusion-controlled debinding process is established. The evolution of porous microstructure during the water debinding process is observed using scanning electron microscopy. Based on these observations, a water debinding mechanism for titanium alloy compacts formulated with PEG-based binders is proposed. (C) 2013 Elsevier B.V. All rights reserved.