(內(nèi)蒙古工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院，呼和浩特 010051)
摘 要: 采用電解液成分逐漸加入法，在6種電解液中對(duì)ZAlSi12Cu2Mg1試樣進(jìn)行微弧氧化處理，研究電解液組成對(duì)微弧氧化陶瓷膜形成的影響，尋找合適的電解液組成。結(jié)果表明：電解液組成對(duì)陶瓷膜層的厚度、粗糙度、硬度、耐磨性、膜層微觀形貌及相組成的影響很大，通過(guò)調(diào)節(jié)電解液成分，可獲得性能優(yōu)良的陶瓷膜。適宜的電解液組成為：8 g/L NaSiO3，1 g/L NaOH，2 g/L Na2WO4，0.5 g/L Na2EDTA及10 mL/L丙三醇。在此種電解液組成下，獲得的陶瓷膜厚156 μm，面粗糙度為259 nm，顯微硬度達(dá)HV 891。在干摩擦條件下，經(jīng)30 min磨損后，其磨損僅為基體的13.29%。觀察膜層微觀形貌，膜層均勻致密。XRD分析表明：氧化層中含有Al、莫來(lái)石、SiO2、α-Al2O3、γ-Al2O3 和WO3相。
關(guān)鍵字: ZAlSi12Cu2Mg1；電解液組成；微弧氧化；陶瓷膜
（School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot 010051, China）
Abstract: ZAlSi12Cu2Mg1 samples were treated by microarc oxidation (MAO) in six different electrolytes. To obtain appropriate electrolyte constitutes, the effects of electrolyte constitutes on ceramic coatings of ZAlSi12Cu2Mg1 MAO were investigated. The results indicate that the electrolyte composition has great influence on thickness, roughness, microhardness, wear resistance, morphology and phase compositions of ceramic coating. The fine ceramic coating is obtained by changing electrolyte. The appropriate electrolyte constitutes are 8 g/L Na2SiO3, 1 g/L NaOH, 2 g/L Na2WO4, 0.5 g/L Na2EDTA and 10 mL/L glycerin. In this electrolyte, it is feasible to obtain a 156 μm thick coating, the roughness decreases to 259 nm and the microhardness increases to HV 891. The wear mass loss of coating after 30 min is only 13.29% of the matrix, which is relative to ZAlSi12Cu2Mg1 under the condition of dry friction. The morphologies of coatings are continuity and density. The XRD analysis indicates that coatings are composed of mullite, SiO2, α-Al2O3, γ-Al2O3 and WO3.
Key words: ZAlSi12Cu2Mg1; electrolyte constitute; microarc oxidation; ceramic coatings
