热反应法制备粉煤灰陶瓷涂层中的CeO_2对涂层耐磨性能的影响  

Effect of Cerium Dioxide on Wear Resistance of Thermal Reaction Fly Ash Ceramic Coatings of Steel Substrate

作　　者：马壮[1] 杨杰[1] 韩子钰[1] 羊娟[1] 孙方红[1] 

机构地区：[1]辽宁工程技术大学材料科学与工程学院,辽宁阜新123000

出　　处：《材料保护》2013年第9期54-56,8,共3页Materials Protection

基　　金：辽宁省教育厅创新团队项目(2009T044)资助

摘　　要：以化学制剂氧化物制备陶瓷涂层成本高。以廉价粉煤灰为主要原料,添加适量铝矾土和CeO2,通过热化学反应法在Q235钢基体上制备了粉煤灰陶瓷涂层。采用X射线衍射仪、热震法及摩擦磨损试验测试了涂层的结构、抗热震性及耐磨性。结果表明:本法制备的粉煤灰陶瓷涂层中有KAlSiO4,NiMnO3,AlCe3等新相,实现了化学冶金结合,提高了涂层的结合强度;稀土氧化物CeO2的加入可显著提高涂层的耐磨性能,涂层的耐磨粒磨损性较基体提高了6.26倍;耐黏着磨损性较基体提高了4.26倍。It is of a high cost to fabricate ceramic coating with oxide chemicals. Thus cheap fly ash was adopted as the major starting material to fabricate ceramic coatings on Q235 steel substrate via a thermochemical reaction method involving a proper amount of bauxite and CeO 2 as the additives. The phase structure,thermal shock resistance,and wear resistance of as-fabricated ceramic coating were analyzed with an X-ray diffractometer,a thermal shock test rig,and a friction and wear tester. It was found that as-fabricated ceramic coating contained newly formed phases such as KAlSiO 4,NiMnO 3,and AlCe 3. This demonstrated that chemical and metallurgical bonding was formed among various ingredients of starting materials, thereby favoring to increase the bonding strength of the ceramic coating. Besides, the introduction of rare earth oxide CeO 2 helped to significantly increase the wear resistance of the ceramic coating.

关 键 词：陶瓷涂层 粉煤灰 CEO2 磨粒磨损 黏着磨损 

分 类 号：TG174.453[金属学及工艺—金属表面处理]