| SU Hao-wen,ZHAO Qing,CHENG Fa-song,DU Nan,WANG Shuai-xing,HU Yan-qing.Film Structure and Frictional Wear Behaviour of TC4 Titanium Alloy Micro Arc Oxidation-SiC Composite Coating[J],46(4):174-179 |
| Film Structure and Frictional Wear Behaviour of TC4 Titanium Alloy Micro Arc Oxidation-SiC Composite Coating |
| Received:November 17, 2016 Revised:April 20, 2017 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2017.04.028 |
| KeyWord:TC4 titanium alloy micro arc oxidation composite coating SiC particle content friction and wear properties |
| Author | Institution |
| SU Hao-wen |
National Defense Key Disciplines Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang , China |
| ZHAO Qing |
National Defense Key Disciplines Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang , China |
| CHENG Fa-song |
National Defense Key Disciplines Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang , China |
| DU Nan |
National Defense Key Disciplines Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang , China |
| WANG Shuai-xing |
National Defense Key Disciplines Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang , China |
| HU Yan-qing |
Department of Manufacturing Engineering, Chengdu Aircraft Industry Group Co., Ltd, Chengdu , China |
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| Abstract: |
| The work aims to obtain micro arc oxidation-SiC composite coating of excellent friction and wear properties by micro arc oxidation deposition technology. 2.0 g/L SiC particles were added to micro arc oxidation electrolyte which is composed of sodium silicate-sodium hexametaphosphate calgon-sodium tungstate-sodium polyphosphate. TC4 titanium alloy micro arc oxidation-SiC composite coating was prepared in the mode of DC pulse. KH-7700 3D video microscope, XRD and SEM were used to observe and analyze surface, cross section morphology and structure of the composite coating. The friction and wear properties under dry friction wear at room temperature were tested with CFT-1 microscopic wear tester. Microvoidsin SiC composite coating was less than that without SiC phase. SiC, rutile and anatase TiO2 phase, Al2TiO5 phase some amorphous P, Si, W compounds were distributed on the surface of composite coating, but also contains appear in the composite film. Provided with dry frictional wear, friction coefficient of the micro arc oxidation-SiC composite coating was 0.26, specific wear rate was 0.72×10-6 mm3/(N•m), and slight adhesive wear and abrasive wear were present in micro arc oxidation-SiC composite coating. Morphology of the oxide films changed by the new SiC phase in the composite film, friction coefficient and wear rate of the composite film are reduced and composite coating of excellent friction and wear properties is obtained. |
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