采用真空等离子喷涂技术,在不锈钢基体上制备碳化硼(B4C)涂层,并对涂层的组成、结构、沉积效率、结合强度以及抗激光辐照性能进行了表征.结果显示,真空等离子喷涂B4C涂层中没有出现明显的B2O3相,表明真空等离子喷涂可有效避免B4C氧化现象.采用较细的粉末制备的B4C涂层较为致密.较高的喷涂功率和较大的氢气流量,有助于改善粉末的熔化程度,从而提高涂层的沉积效率和结合强度.在适宜的工艺参数下,涂层的沉积效率与结合强度可分别达72%与49MPa.激光辐照试验表明,在不锈钢表面沉积B4C涂层,可以明显改善其抗激光辐照性能.
Boron carbide coatings were deposited onto stainless steel via vacuum plasma spraying (VPS), and then their phase composition, microstructure, deposition efficiency, bonding strength and laser
irradiation resistance were examined. Results obtained show that there is no distinct B2O3 in the VPS B4C coating, indicating that the oxidation of B4C can be avoided during VPS process.
The denser B4C coating can be obtained by using the finer original powder. Deposition efficiencies and bonding strengths of coatings are higher in the cases of higher spray power and higher H2
flow due to the better melting condition of powders during spray process. Under appropriate spray parameters, the deposition efficiency and bonding strength of VPS B4C coating can be high to
72% and 49MPa respectively. Laser ablation test shows that the laser irradiation resistance is improved significantly for stainless steel after being deposited by B4C coating.
参考文献
| [1] | Harris S J, Krauss G, Siniawski M T, et al. Wear, 2002, 249: 1004-1013. [2] Pospieszczyk A, Schweer B, Philipps V, et al. J. Nuclear Materials, 2003, 313-316: 223-229. [3] Buzhinskij O I, Scemenets Y M. Fusion Engineering and Design, 1999, 45: 343-360. [4] Bianchi L, Brelivet P, Freslon A. Plasma Sprayed Boron Carbide Coatings as First Wall Materials for Laser Fusion Target Chamber. In: Coddet C, ed. Proceedings of the 15$^{ th$ International Thermal Spray Conference. Nice, France: Materials Park, 1998. 945-950. [5] 曾毅, 张叶方, 丁传贤(ZENG Yi, et al). 硅酸盐学报(Journal of the Chinese Ceramic Society), 1999, 27(5): 545-550. [6] 曾毅. 等离子喷涂碳化硼涂层研究. 中国科学院上海硅酸盐研究所博士论文, 1999. 24. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%