Effect of powder morphology on the microstructure and properties of cold sprayed Ni coatings

被引：8

作者：

Goral, A. ^{[1
]}

Zorawski, W. ^{[2
]}

Czaja, P. ^{[1
]}

Litynska-Dobrzynska, L. ^{[1
]}

Makrenek, M. ^{[3
]}

Kowalski, S. ^{[2
]}

机构：

[1] Polish Acad Sci, Inst Met & Mat Sci, 25 Reymonta St, PL-30059 Krakow, Poland

[2] Kielce Univ Technol, Fac Mechatron & Machine Bldg, Kielce, Poland

[3] Kielce Univ Technol, Fac Management & Comp Modelling, Kielce, Poland

来源：

INTERNATIONAL JOURNAL OF MATERIALS RESEARCH | 2019年 / 110卷 / 01期

关键词：

Ni coating; Cold spraying; Microstructure; Surface topography; TRIBOLOGICAL PROPERTIES; MECHANICAL-PROPERTIES; NANOCRYSTALLINE NI; EVOLUTION; SUBSTRATE; FEATURES; BEHAVIOR; WEAR;

D O I：

10.3139/146.111698

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Cold sprayed Ni coatings offer new possibilities for repairing damaged and mis-machined components. The morphology of the powder particles and grain-size distribution have a significant influence on the particles' behaviour during compaction and on the properties of the coating. In this study, two Ni powders with different morphology and grain-size distribution were cold sprayed on a 7075 Al alloy substrate. The first powder, Ni HR, had an irregular spherical shape, whereas the second, Ni E, possessed a dendritic shape. SEM and TEM investigations revealed differences in the microstructure and properties of the Ni cold-sprayed coatings. The coating sprayed using the dendritic powder revealed enhanced mechanical properties and the surface had half the roughness of the Ni coatings deposited using the irregular spheroidal powder.

引用

页码：49 / 59

页数：11

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