HVOF喷涂成形纳米晶FeAl厚涂层的结构和热稳定性

金属学报, 2005, 41(6): 561-567. doi: 10.3321/j.issn:0412-1961.2005.06.001

HVOF喷涂成形纳米晶FeAl厚涂层的结构和热稳定性

JI Gang ^1, , 高泰瑞 ^2, , 郝胜智 ^3, , LIAO Hanlin ^4, , 董闯 ^5,

2.Laboratoire d'Etude des Textures et Application aux Matériaux, UMR CNRS 7078, Université de Metz, Ile du Saulcy, 57045 Metz Cedex 01, France;大连理工大学三束材料改性国家重点实验室,大连,116024

3.大连理工大学三束材料改性国家重点实验室,大连,116024

5.大连理工大学三束材料改性国家重点实验室,大连,116024

基金项目: 国家自然科学基金(10176005)

关键词： FeAl合金 , 纳米晶厚涂层 , 喷涂成形 , 超音速火焰喷涂

MICROSTRUCTURE AND THERMAL STABILITY OF HVOF SPRAY FORMED FeAl THICK NANOCOATING

采用超音速火焰喷涂(HVOF)成形工艺喷涂球磨粉末,成功制备了纳米晶FeAl厚涂层(5 mm).分别利用SEM、图像分析、TEM以及Vickers硬度表征了该涂层的微观结构,并与用相同的喷涂参数和原料粉末制备的纳米晶薄涂层(300 μm)进行了比较,研究了不同的喷涂条件对涂层的结构及其硬度的影响.同时,探讨了厚涂层的热稳定性.结果表明,由于涂层中较好地保留了未融粒子中的纳米晶,从而在600℃仍能保持原有的高硬度.

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HVOF喷涂成形纳米晶FeAl厚涂层的结构和热稳定性

MICROSTRUCTURE AND THERMAL STABILITY OF HVOF SPRAY FORMED FeAl THICK NANOCOATING

参考文献