Tribofilm formation from TiC and nanocomposite TiAlC coatings, studied with focused ion beam and transmission electron microscopy

Lindquist, Mattias; Wilhelmsson, Ola; Jansson, Ulf; Wiklund, Urban

doi:10.1016/j.wear.2009.02.002

Cited by 22 publications

(9 citation statements)

References 13 publications

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“…An interesting observation is that coatings with a dissolved weak carbide forming metal is less hard but can exhibit similar wear properties compared to a pure TiC coating. [6,9,10] The concept of dissolving a weak carbide-forming metal into a TMC to modify the structure and properties of a coating can be expanded to a large number of carbides and wide range of dissolving metals. However, a systematic theoretical and experimental investigation of this effect has yet not been carried out.…”

Section: Introductionmentioning

confidence: 99%

Carbon release by selective alloying of transition metal carbides

Råsander¹,

Lewin²,

Wilhelmsson³

et al. 2011

J. Phys.: Condens. Matter

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We have performed first principles density functional theory calculations on TiC alloyed on the Ti sublattice with 3d transition metals ranging from Sc to Zn. The theory is accompanied with experimental investigations, both as regards materials synthesis as well as characterization. Our results show that by dissolving a metal with a weak ability to form carbides, the stability of the alloy is lowered and a driving force for the release of carbon from the carbide is created. During thin film growth of a metal carbide this effect will favor the formation of a nanocomposite with carbide grains in a carbon matrix. The choice of alloying elements as well as their concentrations will affect the relative amount of carbon in the carbide and in the carbon matrix. This can be used to design the structure of nanocomposites and their physical and chemical properties. One example of applications is as low-friction coatings. Of the materials studied, we suggest the late 3d transition metals as the most promising elements for this phenomenon, at least when alloying with TiC.

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Section: Introductionmentioning

confidence: 99%

Carbon release by selective alloying of transition metal carbides

Råsander¹,

Lewin²,

Wilhelmsson³

et al. 2011

J. Phys.: Condens. Matter

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“…This has recently been used by Wilhelmsson and Lindquist to synthesize low friction coatings based on Ti-Al-C solid solution carbides. [5][6][7] The past decades carbide-based nanocomposite coatings have been the subject of intensive research, mainly due to their designable and interesting properties. These nanocomposites typically consist of two phases: hard nanocrystalline carbide particles (nc-MeC, Me ¼ metal) embedded in, or separated by, an amorphous matrix or tissue phase.…”

Section: Introductionmentioning

confidence: 99%

“…For the case of alloying with Al (a weak carbide former) an increased formation of free carbon phase was observed both during deposition and upon later mechanical sliding. [5][6][7] This material can although not be used as an electrical contact material. The introduction of Al to the material can lead to the formation of alumina (Al 2 O 3 ) on the surface of the material.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, structure and properties of Ni-alloyed TiCx-based thin films

et al. 2010

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“…Wu et al [35] have determined that the dry sliding process in air could induce the oxidation of debris under the contact region of countercouples of Ti 3 AlC 2 /AISI-52100 bearing steel [35]. Possibly, TiO 2 , Al 2 O 3 , and Fe 2 O 3 , etc., have been formed during the sliding, which contribute to lowering the coefficient of friction [36]. Figure 6 indicates the high magnification images of worn regions of tailored Ti 3 AlC 2 after ultrasonic cleaning.…”

Section: Worn Mechanismsmentioning

confidence: 99%

Effect of texture microstructure on tribological properties of tailored Ti3AlC2 ceramic

Zhu

Grasso

et al. 2017

J Adv Ceram

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Tribological property of c-axis textured shell-like Ti 3 AlC 2 ceramic was investigated using reciprocating sliding balls (SUS304) under loads of 1, 5, and 9 N. It was found that the textured top surface (TTS), corresponding to the (000l) plane, shows the lowest mean coefficient of friction in comparison with those measured on the textured side surface (TSS), where the sliding directions are parallel (TSS-1) and perpendicular (TSS-2) to c axis, under the same load. Among all the tested orientations, the TSS-2 exhibited the lowest wear rate of 1.51×103 mm 3 /(N·m) under the load of 9 N.The worn mechanisms on the TTS and TSS-1 were delamination, grain fracture, and grain spalling-off. On the TSS-2, plowing effect against balls was the dominating mechanism. This work suggests the criteria to maximize the wear resistance in the load range of 1-9 N.

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Tribofilm formation from TiC and nanocomposite TiAlC coatings, studied with focused ion beam and transmission electron microscopy

Cited by 22 publications

References 13 publications

Carbon release by selective alloying of transition metal carbides

Carbon release by selective alloying of transition metal carbides

Synthesis, structure and properties of Ni-alloyed TiCx-based thin films

Effect of texture microstructure on tribological properties of tailored Ti3AlC2 ceramic

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