Thermomechanical Aspects of Multicomponent Binder Melting and Evaporation in Thermal Debinding

热脱脂中多组分粘合剂熔化和蒸发的热机械方面

• 批准号: 9412609
• 负责人: Massoud Kaviany
• 金额: $ 29.99万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-08-15 至 1998-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9412609&HistoricalAwards=false
• 关键词: Thermomechanical; Aspects; Multicomponent; Binder; Melting

The proposed study seeks to study the fundamental thermo-mechanical aspects of the thermal removal (with and without a setter bed) of multicomponent binders from an injection molded specimen, i.e., the melting and evaporation of multicomponent binders with suspended solid particles. The nearly consolidated particles remaining at the end of the thermal debinding (with a typical 15% reduction in the volume) can be defect free, when during debinding the internal gas pressure and the tensile stress of the partially liquid saturated non-consolidated porous medium (i.e., suspension system) do not exceed some threshold values. It is propose here to make an in-situ measurement of several thermal and mechanical (including defect formation) characteristics and to make visual observations to identify the phenomena, mechanisms, and regimes in thermal debinding of multicomponent binders in the presence (and absence) of a setter bed. It is also proposed to use the experimental results to model these phenomena using rigorous treatment of transport, reaction, phase change, and stress-strain in the binder-suspended particles medium and to predict the transient thermo-mechanical aspects within the specimen during debinding. The anticipated results can contribute to the fundamentals of thermal processing of materials and used in the selection of the multicomponent binder and the setter bed according to the specimen size, shape, and properties, and for the control of the gaseous ambient convective temperature and velocity to prevent defect formation (while reducing the processing time and the energy consumed).

拟议的研究旨在研究从注射模制试样中的多组分粘合剂的热去除（和不带有二元床）的基本热机械方面，即，具有悬浮固体颗粒的多组分粘合剂的熔融和蒸发。 当在扣除内部气体压力和部分液体饱和的非固定多孔培养基（即悬架系统）时，几乎保留在热脱线结束时（典型减少体积减少15％）的几乎固结的颗粒可能是无缺陷的。在这里建议对几种热和机械（包括缺陷形成）特征进行原位测量，并进行视觉观察，以识别在二元床的存在（和不存在）在存在（和不存在）的情况下，识别多组分绑定器的现象，机制和状态。 还建议使用实验结果对这些现象进行对这些现象进行建模，并使用粘合剂悬浮颗粒中的运输，反应，相变和应力 - 应变介质的严格处理，并预测脱核过程中样品内样品内的瞬时热机械方面。预期的结果可能有助于材料热处理的基本原理，并根据样品的大小，形状和特性，用于选择多组分粘合剂和二元床，以及控制气态环境对流温度和速度以防止缺陷形成（同时减少处理时间和能量消耗的能源）。