采用新型溶胶一凝胶法,即在氧化铝溶胶中引入氧化锆陶瓷粉末制成复合浆料,在不锈钢表面制备了Al2O3-ZrO2陶瓷涂层,对涂层的显微组织、成分分布、相组成以及化学结构进行了研究。研究结果表明:该方法制备的涂层,厚度大大高于普通溶胶凝胶法制备的涂层,涂层中形成了一种复杂的氧化铝网络结构,氧化锆颗粒被包覆在其中。最后,分析了复合浆料经烧结、封孔致密化形成该涂层结构的过程。
Alumina-zirconia ceramic coating was obtained on stainless steel by applying a new method.- composite sol-gel coating process which means the technical of adding zirconia powder into alumina sol to form composite slurry. The organization, elements distribution, phase and chemical framework were studied. The coating by this method is thicker than that by the common one. The alumina sol has form a complex alumina network structure which covered zirconia. The process of composite slurry been sintered and densifyed to form such structure was been analyzed.