在硅酸盐溶液中,采用类三角波形脉冲等离子体电解氧化电源,在TC4钛合金表面原位制备陶瓷膜层,利用XRD、SEM和能谱等研究了陶瓷膜层的组成和结构特点,利用热震实验研究了陶瓷膜层的抗热震性能.陶瓷膜层主要由金红石型和锐钛矿型TiO_2组成,反应时间增加,膜层增厚,表面放电孔道减少,孔径变大.能谱分析表明,陶瓷膜层中硅元素含量随着反应时间的增加而增多,钛元素含量的变化与之相反.在900～20 ℃热震条件下,膜层的抗热震性能随反应时间的增大而提高,在反应为25 min时,所制备的膜层抗热震性能最佳,继续延长反应时间,膜层的抗热震性能下降.热震试验使陶瓷膜层中晶相TiO_2含量增加,膜层表面出现裂纹.
Ceramic coatings were prepared in silicate solution on TC4 alloy by analogous triangle-shape plasma electrolytic oxidation power source. The composition and structure of the coatings were studied by XRD, SEM and EDS, respectively. The thermal shock resistance was examined by thermal shock tests. The results showed that the coating was composed of rutile and anatase TiO_2. Increasing the reaction time, the thickness of the coating increases and the number of micro holes deoreases, whose pore size increases. The results of EDS showed that the content of Si in the coating increases with the reaction time whereas the content variation of Ti showed the opposite trend. At the thermal shock tests of 900～20 ℃, the thermal shock resistance of the coating was improved with the reaction time and reached optimum value when the reaction time was 25 min, then decreased with the further extending time. During thermal shock tests the content of the cyrstlized TiO_2 in the coating increases and meantime the micro cracks was found on the coating surface after the thermal shock tests.
参考文献
| [1] | Yerohin A L;Nie X;Leyland A et al.[J].Surface and Coatings Technology,2000,130(2-3):195. |
| [2] | Yerohin A L;Leyland A;Matthews A .[J].Applied Surface Science,2002,200(1-4):172. |
| [3] | Zhongping Yao;Zhaohua Jiang;Fuping Wang .Study on corrosion resistance and roughness of micro-plasma oxidation ceramic coatings on Ti alloy by EIS technique[J].Electrochimica Acta,2007(13):4539-4546. |
| [4] | 龙北红,吴汉华,龙北玉,汪剑波,于文学.处理电压对钛合金微弧氧化膜相结构的影响[J].吉林大学学报（理学版）,2005(02):190-193. |
| [5] | Xue W;Wang C;Chen R et al.[J].Materials Letters,2002,52:435. |
| [6] | Jiang Z H;Sun X T;Li Y P et al.[J].Journal of Materials Science and Technology,2005,21(02):281. |
| [7] | Boguta D L;Rudnev V S;Gordienko P S .[J].Zashchita Metallov,2004,40(03):299. |
| [8] | 孙南海;危立辉 .[J].中南民族大学学报,2004,23(06):47. |
| [9] | Wang Yaming;Jiang Bailing;Lei Tingquan .[J].Materials Letters,2004,58:1907. |
| [10] | 姜兆华,姚忠平,李延平,吕彦冬,孙学通.磷酸盐对钛合金微等离子体氧化陶瓷膜结构和耐蚀性的影响[J].材料科学与工艺,2004(01):75-79. |
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