通过周期浸润腐蚀实验研究了不同SiC颗粒尺寸(70、90、140、220 μm)和不同SiC颗粒体积分数(42%、49%、55%)的SiC_p/Al复合材料在酸性环境中的腐蚀行为. 采用失重法、金相显微镜、X射线衍射仪以及扫描电镜分别计算腐蚀速率、观测微观组织、分析腐蚀产物的物相组成以及观察表面形貌. 结果表明: 腐蚀前期, SiC_p/Al复合材料的耐腐蚀性能随着颗粒尺寸的减小而降低, 腐蚀中后期, 耐蚀性能随着颗粒尺寸的减小反而有一定程度的提高;SiC颗粒的存在一方面促进了点蚀的成核, 另一方面又打断了基体的连续性, 改变了点蚀的生长方式, 抑制了点蚀的进一步扩展;SiC_p/Al复合材料的耐腐蚀性能随着颗粒体积分数的提高而降低, 其腐蚀产物主要为氧化铝和非晶态硫酸铝化合物.
The corrosion behavior of SiC_p/Al composites with different SiC_p sizes(220, 140, 90, 70 μm)and different SiC_p volume fractions(42%, 49%, 55%)was investigated by the alternate immersion test. Mass loss was used to evaluate the corrosion rate. The microstructure of composites was observed by the optical microscope (OM). The phase and surface photography of corrosion products were analyzed by the X-ray diffraction(XRD)and scanning electron microscope(SEM). Experimental results show that the corrosion resistance of the SiC_p/Al composites decreases with decreasing the particle size in the initial stage of corrosion, but increases with decreasing the particle size in the corrosion latter stage. SiC_p accelerates the nucleation of pit, also interrupts the continuity of the matrix channels, alters the growth way and suppresses the further expansion. The corrosion resistance of the SiC_p/AI composites decreases with the increasing the particle content, of which the main corrosion products are Al_2O_3 and Al_xSO_(4y)OH_z.
参考文献
| [1] | 王文明,潘复生,曾苏民,等.碳化硅颗粒增强铝基复合材料开发与应用的研究现状[J].兵器材料科学与工程,2004,27(3):61-67.Wang Wenming,Pan Fusheng,Zeng Sumin,et al.Current status of development and application in SiC_p/Al composites[J].Ordnance Material Science and Engineering,2004,27(3):61-67. |
| [2] | 薛文斌,吴晓玲,施修龄,等.SiC_p/2024Al铝基复合材料表面微弧氧化膜组织机构及其耐蚀性[J].复合材料学报,2006,23(6):98-102.Xue Wanbin,Wu Xiaoling,Shi Xiulin,et al.Microstructure and corrosion-resistance of microarc oxidation film on SiC_p/2024 aluminum matrix composite[J].Acts Materiae Compositae Siniea.2006,23(6):98-102. |
| [3] | 康蒙,程小全,张纪李,等.高体积分数SiC_p/Al复合材料的拉伸、压缩与弯曲特性[J].复合材料学报,2008,25(3):127-131.Kang Meng,Chen Xiaoquan,Zhang Jikui,et al.Tensile,compressive and flexible properties of high volume fraction SiC_p/Al composites[J].Acta Materiae Compositae Sinica,2008,25(3):127-131. |
| [4] | Trowsdale A J,Nble B,Harris S J,Gibbins I S R,et al.The influence of SiC reinforcement on pitting behavior of aluminum[J].Corrosion Science,1996,38(2):177-191. |
| [5] | Feng Z,Lin C,Lin J,Luo J.Pitting behavior of SiC_p/2024Al metal matrix composites[J].J Mater Sci,1998,33(23):5637-5642. |
| [6] | Candan S.Effect of SiC particle sizc on corrosion behavior of pressure infiltrated Al matrix composites in a NaCI solution[J].Materials Letters,2004,58(27/28):3601-3605. |
| [7] | Ramulu M,Paul G,Patel J.EDM surface effects on the fatigue strength of a 15 vol% SiC_p/Al metal matrix composite material[J].Composites Structures,2001,54(1):79-86. |
| [8] | Aghajannian M K,Rocazella M A,Burke J T,et al.The fabrication of metal matrix composite by pressureless infiltration technique[J].J Mater Sci,1991,26(2):447-454. |
| [9] | 中华人民共和国国家标准.GB 10124-1988金属材料实验室均匀腐蚀全浸试验方法[S].北京:中国标准出版社,1988. |
| [10] | Wang Z Y,Ma T,Han W,Yu G C.Corrosion behavior on aluminum alloy LYl_2 in simulated atmospheric corrosion process[J].Trans Nonferrous Met Soc China,2007,1 7(2):326-334. |
| [11] | 贺春林,李凤琴,刘常升,等.SiC_p/2024Al铝基合材料的耐蚀性[J].中国有色金属学报,2001,11(6):1074-1076.He Chunlin,Li Fengqin,Liu Changsheng,et al.Corrosion properties of SiC_p/2024Al matrix composites[J].The Chinese Journal of Nonferrous Metals,2001,11(6):1074-1076. |
| [12] | 范同祥,施忠良,张荻,等.SiC/Al复合材料界面反应程度的测定[J].材料学报,1999,13(4):65-67.Fan Tongxiang,Shi Zhongliang,Zhang Di,et al.Determination of interfacial reaction in Sic/Al composites[J].Materials Review,1999,13(4):65-67. |
| [13] | Candan S.Bilgic E.Corrosion behavior of Al-60 vol% SiC_p composites in NaCl solution[J].Materials Letters,2004,58(22/23):2787-2790. |
| [14] | 房国丽,李进,杨智春,等.SiC/Al复合材料界面反应的热力学分析[J].宁夏工程技术,2007,6(1):76-79.Fang Guoli,Li Jin,Yang Zhichun,et al.Thermodynamics analysis of interfacereactions in SiC/Al composites[J].Ningxia Engineering Technology,2007,6(1):76-79. |
| [15] | 韩薇,王振尧,于国才,汪俊.铝在含SO_2湿润/干燥环境中的腐蚀规律[J].中国有色金属学报,2003,13(3):631-634.Han Wei,Wang Zhenyao,Yu Guocai,Wang J nn.Corrosion of aluminum in wet/dry environment containing SO_2[J].The Chinese JOHrna[of Nonferrous Metals,2003,13(3):631-634. |
| [16] | 周和荣,李晓刚,董超芳,等.2Al_2铝合金在模拟溶液中的周浸腐蚀行为[J].装备环境工程,2007,4(5):5-6.Zhou Herong,Li Xiaogang,Dong Chaofang,et al.Corrosion behaviors of aluminum alloy 2A12 under cyclic wet-dryimmersion test in simulation solutions[J].Equipment Environmental Engineering,2007,4(5):5-6. |
| [17] | 吴瑾光.近代傅里叶变换红外光谱技术及应用[M].北京:科学技术文献出版社,1994:272. |
| [18] | 莱格拉夫 C,格雷德尔 T.大气腐蚀[M].韩恩厚,译.北京:化学工业出版社,2005:201-209. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%