等离子喷涂涂层抗烧蚀性能及微观结构  

Ablation resistance properties and microstructure of plasma spraying coatings

作　　者：林冰涛[1,2] 张保红 唐亮亮[1,2] 熊宁 张丹华[1,2] 张蕾 LIN Bingtao;HANG Baohong;TANG Liangliang;XIONG Ning;ZHANG Danhua;ZHANG Lei(Advanced Technology and Materials Co.,Ltd.,Beijing 100081,China;ATTL Advanced Materials Co.,Ltd.,Beijing 100094,China)

机构地区：[1]安泰科技股份有限公司,北京100081 [2]安泰天龙钨钼科技有限公司,北京100094

出　　处：《粉末冶金技术》2023年第3期282-288,共7页Powder Metallurgy Technology

摘　　要：以45#钢和TC4钛合金为基体材料,采用等离子喷涂方法制备了钨(W)及钨合金涂层,并在不同烧蚀条件下进行了烧蚀实验,比较了涂层的抗烧蚀性能,探讨了涂层烧蚀破坏机理。结果表明:基体材料喷涂W涂层后,提高了抗烧蚀性能。烧蚀温度为2600℃时,烧蚀11s,涂层存在氧化,基本无烧蚀现象;烧蚀温度为3400℃时,烧蚀6s,涂层有了明显的烧蚀,存在基体熔化现象,说明热量传递到基体,导致基体温度超过了自身熔点。W+Al_(2)O_(3);和W+ZrO_(2)复合涂层可减缓热量从涂层表面向基体的传递速率,提高了基体材料的抗烧蚀性能。W+Al_(2)O_(3)和W+ZrO_(2)复合涂层测力曲线呈锯齿状下降,不抗冲刷,但涂层的抗烧蚀时间相对较长。Tungsten(W)and tungsten alloy coatings were prepared by plasma spraying on 45#steel and TC4 titanium alloys.Ablation tests were carried out under the different ablation conditions.The ablation resistance of the coatings was compared,and the ablation failure mechanism of the coatings was discussed.The results show that,the ablation resistance of the base materials is improved by spraying W coatings.When the ablation temperature is 2600℃ for 1l s,the coatings are oxidized,and there is no ablation phenomenon.When the ablation temperature is 3400℃for6s,thecoatingshavetheobviousablation,indicatingthattheheatis transferred to the matrix,resulting in the matrix temperature exceeding the own melting point.The W+Al_(2)O_(3) and W+ZrO_(2) composite coatings slow down the heat transfer rate from the coating surface to the substrate,and improve the ablative resistance of the substrate materials.The dynamometer curves of W+Al_(2)O_(3) and W+ZrO_(2) composite coatings show the zigzag decline and do not resist the erosion,but the coating ablative resistance time is relatively long.

关 键 词：等离子喷涂 W涂层 复合涂层 抗烧蚀性能 

分 类 号：TQ174.4[化学工程—陶瓷工业] TB35[化学工程—硅酸盐工业]