—NCO含量对聚氨酯/陶瓷复合材料冲蚀磨损性能的影响  

Effect of Different —NCO Content on the Erosive Wear Resistance of Polyurethane Composite

作　　者：李茂华[1] 栾道成[2] 张光业[1] 

机构地区：[1]湖南科技大学机电工程学院,湖南湘潭411201 [2]西华大学材料科学与工程学院,四川成都610039

出　　处：《润滑与密封》2006年第6期53-55,63,共4页Lubrication Engineering

基　　金：国家自然科学基金重大项目(59895152);863高技术项目(863-715-005-0030);四川省应用基础研究资助项目(042287);四川省特种材料及制备技术重点实验室开发基金项目(Z01141);湖南科技大学硕士资金资助项目(E50442)

摘　　要：用聚四氢呋喃醚二醇(PTMG)与甲苯二异氰酸酯(TD I)反应,再与陶瓷粉末进行共混,制得耐磨蚀聚氨酯复合材料。用相对抗冲蚀磨损性法评价了聚氨酯陶瓷复合材料的耐磨性,通过扫描电镜观察了聚氨酯复合材料的磨损形貌,尝试解释了陶瓷颗粒增强聚氨酯弹性体的抗冲蚀磨损机制。试验表明:当—NCO含量为6.35%、Si3N4粉末质量分数为10%时,耐磨性能最好,可提高纯聚氨酯弹性体抗冲蚀磨损性能近2倍。Polyurethane ceramic composite materials were synthesized from polytetrahydrofuran, toluene diisocyanate and ceramic powders. Erosion wear resistance of polyurethane ceramic composite materials was valued with relative erosion wear resistance. The wear mechanisms of composites were discussed through examining and analyzing the worn surfaces with a scanning electron microscope. Results show that composite can be strengthened when Si3 N4 ceramic powders weight content is 10% ,-NCO content is 6.35% ,erosion wear resistance of which is almost 2 times of polyurethane（-NCO content is 6. 35% ）.

关 键 词：聚氨酯 陶瓷粉末 复合材料 冲蚀磨损 

分 类 号：TH117.1[机械工程—机械设计及理论] TQ174[化学工程—陶瓷工业]