Characterization and Wear Behavior of Heat-treated Ni3Al Coatings Deposited by Air Plasma Spraying

被引：8

作者：

Mehmood, K. ^{[1
]}

Rafiq, M. A. ^{[1
]}

Khan, A. Nusair ^{[2
]}

Ahmed, F. ^{[1
]}

Rauf, M. Mudassar ^{[2
]}

机构：

[1] Univ Engn & Technol, Met & Mat Engn Dept, Lahore, Pakistan

[2] Inst Ind Control Syst, Rawalpindi, Pakistan

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2016年 / 25卷 / 07期

关键词：

air plasma spraying; characterization; isothermal treatment; nickel aluminide; wear behavior; CAVITATION EROSION; CORROSION BEHAVIOR; HOT CORROSION; RESISTANCE; NICKEL; NI; FRICTION; CARBIDE; ALLOYS; DRY;

D O I：

10.1007/s11665-016-2120-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Air plasma spraying was utilized to deposit Ni3Al coatings on AISI-321 steel substrate. The deposited coatings were isothermally heat-treated at various temperatures from 500 to 800 A degrees C for 10, 30, 60, and 100 h. The x-ray diffraction analysis revealed NiO formation in Ni3Al at 500 A degrees C after 100 h, and the percentage of NiO increased with increasing exposure time and temperature. The hardness of the coating increased with the formation of NiO. The DSC test showed the formation of minor phases, Al3Ni and Al3Ni2, within the coating along with the major phase Ni3Al. TGA revealed a slowing down of the oxidation rate upon surface oxide formation. The pin-on-disk wear test on the as-sprayed and heat-treated coatings showed that wear rate and coefficient of friction decreased with an increase in the NiO phase content.

引用

页码：2752 / 2760

页数：9

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