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为了提高涂层与钛合金基体的结合强度,采用高速火焰喷涂方法,在Ti6Al4V钛合金基体表面喷涂不同比例的钛-生物玻璃复合涂层,喷涂后试样以5℃/min加热至700℃保温1h后随炉冷却。结果表明:高速火焰喷涂方法制备以钛为主粉,添加不同含量底釉生物玻璃(G),获得的涂层热处理前后结合强度范围在38～57MPa之间。涂层结合强度受喷涂粉体G添加量和热处理的影响。随着G添加量增加,结合强度升高,涂层经热处理后,结合强度略有下降。热处理释放了喷涂时产生的应力,使纯钛涂层裂纹加宽。而G的加入,与钛相互作用,发生浸润、扩散,涂层有再结晶和新相沿裂纹析出,起到修复裂纹的作用。
In order to improve the bonding strength between the coating and the titanium alloy matrix, different proportions of Ti-Bioglass composite coatings were sprayed on the Ti6Al4V titanium alloy substrate by high-speed flame spraying. The samples were heated at 5 ℃ / min to 700 ℃ after spraying 1h after the furnace cooling. The results show that the high-speed flame spraying method uses titanium as the main powder, and different contents of the bottom glaze bioglass (G) are added. The bonding strength before and after heat treatment is between 38 and 57 MPa. The bonding strength of the coating is affected by the amount of powder G added and the heat treatment. With the increase of G content and bonding strength, the bonding strength decreased slightly after heat treatment. Heat treatment releases the stress generated during spraying, widening the crack in the pure titanium coating. The addition of G, with titanium interaction, infiltration, diffusion, recrystallization of the coating and the new phase along the crack precipitation, play a role in repair cracks.