Details

Autor(en) / Beteiligte

• Zhang, Pengfei
• Li, Yuxin

Titel

Effects of CeO2, Si and Co on the microstructure and properties of Ni-Cu composite coating on 6061 aluminium alloy by laser cladding

Ist Teil von

• Philosophical magazine letters, 2021-08, Vol.101 (8), p.303-311

Ort / Verlag

Abingdon: Taylor & Francis

Erscheinungsjahr

2021

Quelle

Taylor & Francis 数据库

Beschreibungen/Notizen

• Ni-Cu composite coatings have been fabricated on a 6061 aluminium alloy surface using a pulsed Nd-YAG laser. The basic coating was Ni-Cu powder with a Ni:Cu ratio of 4:1. The effects of adding to this powder 0.9 wt.% CeO 2 , 0.9 wt.% Si and 0.9 wt.% Co on the microstructure, microhardness and wear properties of the coatings have been investigated. The results show that, on adding the CeO 2 , Si or Co powders, the microstructure of the top region of the coating is mainly composed of equiaxed grains, dendritic crystals and fine equiaxed crystals, whereas the bottom region mainly consists of long rod-like, dendritic crystals and some particles. The average microhardness of the 99.1 wt.% Ni-Cu + 0.9 wt.% CeO 2 coating is 529.05 HV, which was about four times higher than that of the bare 6061 aluminium alloy. In addition, the average friction coefficient decreased on adding CeO 2 , Si and Co powder to the Ni-Cu composite coating.