等离子喷涂硅酸盐搪瓷涂层及其热循环行为研究  

Preparation of silicate enamel coating by plasma spraying and study on its thermal cycling behavior

作　　者：杨均 姚青 李怀峰 卞清 裴妍娜 薛召露 YANG Jun;YAO Qing;LI Huaifeng;BIAN Qing;PEI Yanna;XUE Zhaolu(Ningbo Fotile Kitchenware Co.,Ltd.,Ningbo 315336,China;Analysis and Test Center,Anhui University of Technology,Maanshan 243032,China;Hubei Sanjiang Aerospace Hongyang Electromechanical Co.,Ltd.,Xiaogan 432100,China;Research Center of Modern Surface&Interface Engineering,Anhui University of Technology,Maanshan 243032,China)

机构地区：[1]宁波方太厨具有限公司,浙江宁波315336 [2]安徽工业大学现代分析测试中心,安徽马鞍山243032 [3]湖北三江航天红阳机电有限公司,湖北孝感432100 [4]安徽工业大学现代表界面工程研究中心,安徽马鞍山243032

出　　处：《电镀与涂饰》2024年第2期76-83,共8页Electroplating & Finishing

摘　　要：[目的]硅酸盐搪瓷涂层在冷热循环过程中的失效行为很少受到关注。[方法]采用喷雾造粒与烧结相结合的方式制备了多组分硅酸盐团聚烧结喷涂粉末材料,随后采用大气等离子喷涂技术在12CrMoV合金钢表面制备了SiO_(2)-Al_(2)O_(3)-Na_(2)CO_(3)-CaO基硅酸盐搪瓷涂层,研究了该涂层的微观组织和在700℃下的水淬热震循环行为。[结果]硅酸盐团聚烧结喷涂粉末材料呈球形,粒径分布在20~60μm之间。等离子喷涂硅酸盐涂层呈明显的堆叠层状铺展沉积,表面较为粗糙,其内部虽然存在一定数量的闭孔,但整体较为致密,除了含有一定数量的非晶相,还有SiO_(2)、Al_(2)SiO_(5)和Ca_(2)MgSi_(2)O_(7)晶相。该涂层在700℃水淬热震循环145次后发生部分脆性剥落。[结论]热震循环过程中发生的金属基体氧化、晶相分解,以及冷热交变循环等因素产生的热应力可能是导致涂层失效的原因。[Introduction]The failure behavior of silicate enamel coating in the process of hot/cold cycling has received little attention.[Method]A agglomerated and sintered multi-component silicate powder suitable for atmospheric plasma spraying was prepared with SiO_(2),Al_(2)O_(3),Na_(2)CO_(3),and CaO by the combination of spray granulation and sintering,and then used to fabricate a silicate coating on the surface of 12CrMoV alloy steel by atmospheric plasma spraying technology.The microstructure and thermal cycling behavior of the coating at 700℃ were studied.[Result]The agglomerated and sintered silicate powder is spherical with a particle size ranging from 20 to 60μm.The plasma-sprayed silicate coating presents obvious layer stacking deposition,and its surface is relatively rough.Although there are a certain number of closed pores inside,the whole coating is relatively compact.The coating is composed of not only a certain amount of amorphous phases,but also some crystalline phases such as SiO_(2),Al_(2)SiO_(5),and Ca_(2)MgSi_(2)O_(7).The plasma-sprayed silicate coating failed due to partial brittle spalling after 145 cycles of thermal shock at 700°C under water quenching.[Conclusion]The failure of the coating may be due to the partial oxidation of the metal matrix,the decomposition of crystal phases,and the thermal stress caused by the alternating heat and cold cycle.

关 键 词：合金钢 硅酸盐搪瓷涂层 大气等离子喷涂 喷雾造粒 热循环 微观结构 

分 类 号：TQ174[化学工程—陶瓷工业]