| 等离子喷涂铁基涂层的疲劳磨损裂纹行为 |
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| 引用本文： | 朴钟宇,徐滨士,王海斗.等离子喷涂铁基涂层的疲劳磨损裂纹行为[J].摩擦学学报,2011,31(1):56-60. |
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| 作者姓名： | 朴钟宇 徐滨士 王海斗 |
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| 作者单位： | 1. 装甲兵工程学院装备再制造技术国防科技重点实验室,北京,100072;燕山大学机械工程学院,秦皇岛066004
2. 装甲兵工程学院装备再制造技术国防科技重点实验室,北京,100072 |
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| 基金项目： | 国家自然科学基金(50975285, 50735006) 、装备预研基金重点项目（9140A270304090C8501） |
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| 摘 要： | 采用等离子喷涂制备了铁基涂层，使用球盘式疲劳磨损试验机进行涂层的疲劳磨损试验，利用声发射技术在线判断涂层开裂，并通用透射电子显微镜（TEM）分析了试验前后涂层内部微观结构，研究了喷涂层疲劳磨损裂纹的扩展行为。结果表明：制备的涂层致密，结合状态良好，主要相为铁素体，同时存在大量的非晶-纳米晶相，利用声发射技术能够表征涂层的临界失效状态，其内部疲劳磨损裂纹主要以韧性穿晶断裂的形式扩展。
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| 关 键 词： | 等离子喷涂 疲劳磨损 声发射技术 穿晶断裂 |
| 收稿时间： | 5/4/2010 12:00:00 AM |
Behavior of Rolling Contact Fatigue Crack of Plasma Sprayed Fe-based Coating |
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| PIAO Zhong-yu,XU Bin-shi and WANG Hai-dou.Behavior of Rolling Contact Fatigue Crack of Plasma Sprayed Fe-based Coating[J].Tribology,2011,31(1):56-60. |
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| Authors: | PIAO Zhong-yu XU Bin-shi and WANG Hai-dou |
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| Institution: | 1.National Key Laboratory for Remanufacturing, Academy of Armored Forces Engineering, Beijing 100072
2.School of Mechanical Engineering, YanShan University, Qinhuangdao 066004;National Key Laboratory for Remanufacturing, Academy of Armored Forces Engineering, Beijing 100072;National Key Laboratory for Remanufacturing, Academy of Armored Forces Engineering, Beijing 100072 |
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| Abstract: | Fe-based coatings were deposited by plasma spraying. The rolling contact experiment was conducted on a ball-on-disc tester. The fractures of the coatings were monitored by acoustic emission (AE). The propagation of cracks in the coating was investigated. Results showed that the deposited coating had a dense microstructure and was mainly composed of ferrite. There were many amorphous/nanocrytalline phases in the coating. The critical status to failure can be characterized by acoustic emission (AE) signals. The ductile transcrystalline fracture was the main propagating mode of cracks in the coatings in the rolling contact. |
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| Keywords: | plasma spraying rolling contact fatigue acoustic emission transcrystalline fracture |
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