ABSTRACT The minimisation of temperature–time schedules to thermally debind ceramic green bodies has been examined for the case when the species of binder degradation transit the green component via gas permeation in the pore space. The model is based on the spatial–temporal reaction–permeability equation in conjunction with differential equations describing the decomposition rate and temperature–time cycle, plus an algebraic constraint which limits the buildup of pressure to avoid component failure. An approach using finite elements with a process controller was compared to an approximate approach using the pseudo-steady-state modelling assumption in conjunction with the calculus of variations. The two approaches exhibit excellent agreement, which supports the accuracy of the pseudo-steady-state assumption and the usefulness of the process control strategy, both of which can save time and energy in debinding ceramic components. The process control methodology was also applied to the complex geometry of a ceramic engine valve.

中文翻译：

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通过脱脂绿色陶瓷组件的过程控制反应-渗透性最佳时间加热策略

摘要 当粘合剂降解种类通过孔隙空间中的气体渗透转移生坯部件时，已经研究了热脱脂陶瓷生坯的温度-时间安排的最小化。该模型基于空间-时间反应-渗透率方程，结合描述分解速率和温度-时间循环的微分方程，加上代数约束，限制压力的积累以避免组件故障。将使用有限元和过程控制器的方法与使用伪稳态建模假设结合变分计算的近似方法进行比较。这两种方法表现出极好的一致性，支持伪稳态假设的准确性和过程控制策略的有用性，两者都可以节省陶瓷组件脱脂的时间和精力。过程控制方法也应用于陶瓷发动机气门的复杂几何形状。