热酸蚀刻法粗化处理氧化锆陶瓷表面的初步研究

目的:对不同表面处理方式粗化的氧化锆陶瓷进行表面形态学观察和粗糙度测量?方法:制作氧化锆瓷片,分为4组接受不同的表面处理(A:氧化铝喷砂;B:摩擦化学法硅涂层;C:热H2SO4/(NH4)2SO4蚀刻;D:热HF/HNO3蚀刻)?扫描电镜(SEM)观察氧化铝砂砾?Cojet砂砾?以及4种表面处理的氧化锆瓷片表面的形态,分别以三维景深显微镜和原子力显微镜测量各组瓷片的表面粗糙度?测量结果进行统计分析?结果:A?B组瓷片呈现了类似的表面粗化形态; C?D组瓷片高倍SEM视野下呈现了更好的粗化结构?粗糙度测量结果及统计分析显示,微米级粗糙度大小依次为, C组> A组?B组> D组(P < 0.05);纳米级粗糙度大小依次为, C?D组> A?B组(P < 0.05)?结论:热酸蚀刻对氧化锆陶瓷提供了更好的纳米级表面粗糙度和表面粗化结构?

Surface roughening of zirconia via hot acid etching

Objective:To observe the micro-morphologic of the zirconia surface treated with different roughening methods and test roughness of these surface. Methods:Zirconia blocks were manufactured and divided into four groups receiving different treatments (A,alumina sandblasting;B,tribochemical silica coating;C,hot H2SO4/(NH4)2SO4 etching;D,hot HF/HNO3 etching). An scanning electron microscope (SEM),and an atomic force microscope (AFM) were used to address the treated zirconia surface. The roughness values of the four groups were statistically analyzed. Results:Specimens of group A and B showed similar micro-morphologic,while group C and D presented a better roughening structure. The micron-scale roughness values were ranked as group C>groups A and B> group D (P < 0.05),while the nano-scale roughness value of the two hot acid etching groups were statistically higher than that of the other two groups (P < 0.05). Conclusion:Etching zirconia with hot acids provided a better roughening structure and higher nano-scale roughness.