Influence of Mo content on properties of Ti–Al–Mo–N films. (3rd April 2021)

• Record Type: Journal Article
• Authors: Gao, Ting; Yu, Lihua; Lu, Guiyun; Ju, Hongbo; Xu, Junhua
• Is Part Of: Surface engineering. Volume 37:Number 4(2021)
• Page Start: 519
• Page End: 526
• Publication Date: 2021-04-03
• Subjects: Ti–Al–Mo–N films -- magnetron sputtering -- microstructure -- mechanical properties -- tribological properties; Surfaces (Technology) -- Periodicals; Coatings -- Periodicals; 620.4405
• DOI: 10.1080/02670844.2020.1807814
• Languages: English
• ISSNs: 0267-0844

Abstract

ABSTRACT: Ti–Al–Mo–N composite films with different molybdenum content were deposited by reactive magnetron sputtering. The results showed that the films consisted of fcc-(Ti, Al, Mo) N substitutional solid solution within 8.2 at.-% Mo. The films consisted of two phases which were fcc-(Ti, Al, Mo) N substitutional solid solution and fcc-Mo2 N at 27.7–49.4 at.-% Mo. The hardness increased slowly at 0–27.7 at.-% Mo and then increased rapidly at above 27.7 at.-% Mo. A ball-on-disc dry sliding test was conducted on films deposited on stainless-steel substrates. The friction coefficient quickly decreased within 8.2 at.-% Mo and then gently declined at 8.2–49.4 at.-% Mo. The value of wear rate remained quite constant for compositions in the range 0–34.3 at.-% Mo and then dropped quickly at 34.3–49.4 at.-% Mo. The addition of Mo content effectively improved the hardness and tribological properties of the films.