Enhanced surface properties of aluminum by PVD-TiN coating combined with cathodic cage plasma nitriding

被引：75

作者：

Bashir, M. I. ^{[1
]}

Shafiq, M. ^{[1
]}

Naeem, M. ^{[2
]}

Zaka-ul-Islam, M. ^{[3
]}

Diaz-Guillen, J. C. ^{[4
]}

Lopez-Badillo, C. M. ^{[5
]}

Zakaullah, M. ^{[1
]}

机构：

[1] Quaid I Azam Univ, Dept Phys, Islamabad 45320, Pakistan

[2] Women Univ Azad Jammu & Kashmir, Dept Phys, Bagh, Pakistan

[3] Jazan Univ, Dept Phys, Fac Sci, POB 114, Jazan, Saudi Arabia

[4] Corp Mexicana Invest Mat, CONACYT, Saltillo 25290, Coahuila, Mexico

[5] Univ Autonoma Coahuila, Fac Ciencias Quim, Saltillo 25280, Coahuila, Mexico

来源：

SURFACE & COATINGS TECHNOLOGY | 2017年 / 327卷

关键词：

Aluminum; Indentation and hardness; Diffusion; Cathodic cage plasma nitriding; X-ray techniques; MECHANICAL-PROPERTIES; TITANIUM NITRIDE; DEPOSITION; SUBSTRATE; STEEL; PERFORMANCE; DIFFUSION; ALLOY; MICROSTRUCTURE; TEMPERATURE;

D O I：

10.1016/j.surfcoat.2017.08.015

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Aluminum and its alloys are widely employed in aerospace and automobile industries. However, they exhibit poor surface properties, which considerably reduce their applicability. The titanium nitride (TiN) coatings deposited by physical vapor deposition (PVD) are extensively used on aluminum due to their excellent surface features. Unfortunately, TiN coatings contain pores, voids, and pinholes; as well as they get oxidized during machining, which significantly reduces their surface hardness. In this work, we have investigated a hybrid coating combining TiN (deposited by PVD) with cathodic cage plasma nitriding (CCPN), in alternating sequence, to improve the surface properties of aluminum. The results show that post-CCPN treatment of TiN coating attains higher surface hardness, better wear resistance and excellent film quality due to combined diffusion of iron, nitrogen, and substrate aluminum in TiN. Also, the problem of pores has been eliminated. The results are contradictory to the conventional routine in duplex coatings, where pre-plasma nitriding is typically used. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：59 / 65

页数：7

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