摘要
研发了一种改进型催化脱脂型粘结剂,并应用于铁基多孔材料的注射成形。结果表明,该催化脱脂型喂料表现出假塑性,流变性能良好,在温度180℃、剪切速率1 961 s-1条件下,非牛顿指数n和黏流活化能E分别为0.378、40.89 k J/mol。以HNO3为催化剂,催化脱脂速率快,达到1 mm/h,试样经5 h催化脱脂,脱脂率达到85.6%。采用注射成形技术制备的多孔材料,孔隙分布均匀,开孔孔隙率为19.44%时,抗拉强度为460.68 MPa。
A modified catalytic debinding binder was developed and applied to the iron-based porous materials in- jection molding. The results show that feedstock of the binder exhibites pseudoplastic and good rheological proper- ties, while the non-newton index n and the viscous flow activation energy E are 0.378 and 40.89 kJ/mol respective- ly at 180 ℃, 1 961 s-1 shear rate. Using HNO3 as catalyst, catalytic degreasing rate is quick and up to 1 mm/h, and the debinding rate reaches 85.6% after catalytic debinding for 5 h. The porous materials prepared by powder injec- tion molding method show uniform pores distribution. Besides, the tensile strength of the porous materials is 460.68 MPa while the opening porosity is 19.44%.
出处
《粉末冶金工业》
CAS
北大核心
2015年第5期36-41,共6页
Powder Metallurgy Industry
