新成形剂热脱脂动力学

Thermal debinding dynamics of novel binder system

研究了新开发的几种硬质合金挤压成形剂的热脱脂动力学.发现热脱脂过程可分为低温区内低分子量组元的脱除与高温区内高聚物组元的脱除2个阶段,热脱脂速率的控制机理以扩散机制为主.用微分法和积分法求得了反应活化能,结果表明,其它组元的加入起了催化剂的作用,能有效地降低热脱脂反应活化能.

Thermal debinding dynamics of newly developed binders for cemented carbides extrusion moldingwas studied, which shows that the thermal debinding processes can be devided into two stages: low tem-perature region, in which the low molecular weight components (LMWCs) are removed; and high temper-ature region, in which the polymer components are removed. The rates of thermal debinding are controlledby diffusion mechanism. The thermal debinding activation energies are obtained hy differential methodand integral method. The results show that the adding of other components acted as a catalyzer can effec-tively decrease the activation energy of thermal debinding processes.