Thermomechanical Aspects of Multicomponent Binder Melting and Evaporation in Thermal Debinding

拟议的研究旨在研究从注塑样品中热去除多组分粘合剂的基本热机械方面（有和没有固定床），即，具有悬浮固体颗粒的多组分粘合剂的熔化和蒸发。 在热脱粘结束时保留的几乎固结的颗粒（体积通常减少15%）可以是无缺陷的，当在脱粘期间部分液体饱和的非固结多孔介质的内部气体压力和拉伸应力（即，悬挂系统）不超过某些阈值。它建议在这里进行原位测量的几个热和机械（包括缺陷的形成）的特性，并进行目视观察，以确定的现象，机制，和制度的多组分粘合剂的热脱脂中的存在（和不存在）的一个setter床。 它还建议使用实验结果来模拟这些现象，使用严格的处理的传输，反应，相变，和应力-应变的粘合剂悬浮颗粒介质和预测的瞬态热机械方面的试样在脱脂过程中。预期的结果可以有助于材料的热处理的基本原理和用于选择的多组分粘合剂和setter床根据试样的尺寸，形状和属性，并用于控制气体环境对流温度和速度，以防止缺陷的形成（同时减少处理时间和消耗的能量）。

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).