高温熔烧法制备金属基陶瓷涂层的研究

Preparation and property of ceramic coatings for metal substrate using high temperature melting process

以玻璃熔块、氧化铬粉、粘土粉和硅酸锆微粉为原料制成的涂料,用滚涂法将其均匀涂覆在不锈钢管上,经高温(1000～1050 ℃保温20 min)熔烧制备出了耐磨、抗高温氧化的陶瓷涂层.对陶瓷涂层的耐磨性、抗高温氧化性、抗热震性等性能进行了测试,并对影响涂层性能的因素进行了研究.结果表明:引入具有较大热膨胀系数的玻璃熔块料有利于提高涂层结合性;加涂层的试样均能明显改善基体的耐磨性和抗高温氧化性.涂层的耐磨性随硅酸锆微粉加入量的增加而提高,加入量为15%时耐磨性和抗热震性最好,其热震循环(1000 ℃(→←)空冷)可达22次.

Ceramic coatings with high resistances to abrasion and high temperature oxidation were prepared on stainless steel substrate using lump glass,chrome oxide powder,clay powder and microfines ZrSiO4 as starting materials by high temperature melting at 1000 ～ 1050 ℃ for 20 min. The resistances to abrasion,oxidation at high temperatures and thermal shock of the ceramic coatings were determined, and the parameters influencing the properties of the coatings were studied. The results showed that.1）Adding lump glass improved the adhesion property of the coating;2）The stainless steel substrate with ceramic coating had a higher resistance to abrasion, erosion and oxidation at high temperatures than that without coating ;3）The abrasive resistance of the coating increased with the increase of ZrSiO4 addition,and the coating with 15% ZrSiO4 had the best abrasion resistance and thermal shock resistance reaching 22 cycles（1100 ℃,air cooling ）.