Thermochemical processes occurring in a titanium nitride coating under the effect of thermal laser pulses

The thermochemical processes in a TiN coating deposited on a steel substrate under cyclic irradiation with laser pulses are investigated. It has been established that the combustion of the coating in the irradiated regions occurs spatially inhomogeneously due to the uneven distribution of microregions in the coating, consisting of titanium nitride compounds with different stoichiometry. It is shown that dissociation reactions of various titanium nitride compounds with the release of free nitrogen occur inside the coating. As a result, the ratio of the mass fractions of titanium nitride compounds with different stoichiometry changes in comparison with the original coating. Diffusion of nitrogen into the steel substrate results in the formation of iron nitride.

Download Full-text

Effects of Hydrothermal Treatment on Properties of Titanium Nitride Coating for Dental Implants

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.529-530.247 ◽

2012 ◽

Vol 529-530 ◽

pp. 247-250 ◽

Cited By ~ 1

Author(s):

Xing Ling Shi ◽

Kanji Tsuru ◽

Giichiro Kawachi ◽

Ishikawa Kunio

Keyword(s):

Surface Morphology ◽

Titanium Nitride ◽

Hydrothermal Treatment ◽

Dental Implant ◽

Pure Titanium ◽

Surface Hardness ◽

Nitride Coating ◽

Tin Coating ◽

Titanium Nitride Coating ◽

Implant Coating

To improve surface hardness of dental implant made of pure titanium (Ti), titanium nitride (TiN) coating was introduced. However, studies revealed that TiN only showed osseointegration similar or inferior to that of Ti. Therefore it is necessary to improve the biocompatibility of TiN for dental implant coating. In the present study, TiN coating was prepared on pure Ti substrates and hydrothermal treatment was conducted to modify its surface properties. It was found that, TiN surface was partially oxidized after treatment and calcium (Ca) was successfully combined onto its surface. Surface morphology, roughness and hardness were not affected after treatments below 140°C and wettability was obviously improved.

Download Full-text

Tribotechnical Characteristics of Titanium Nitride Coating for Heavy-Duty Friction Clutches.

Trenie i Iznos ◽

10.32864/0202-4977-2020-41-5-558-566 ◽

1980 ◽

Vol 41 (5) ◽

pp. 558-566

Author(s):

O. Yu Elagina ◽

◽

D.O. Kolbas ◽

A.G. Buklakov ◽

N. Derr ◽

...

Keyword(s):

Titanium Nitride ◽

Nitride Coating ◽

Heavy Duty ◽

Titanium Nitride Coating ◽

Tribotechnical Characteristics

Download Full-text

Titanium-Nitride Coating of Orthopaedic Implants: A Review of the Literature

BioMed Research International ◽

10.1155/2015/485975 ◽

2015 ◽

Vol 2015 ◽

pp. 1-9 ◽

Cited By ~ 94

Author(s):

Ruud P. van Hove ◽

Inger N. Sierevelt ◽

Barend J. van Royen ◽

Peter A. Nolte

Keyword(s):

Titanium Nitride ◽

Polyethylene Wear ◽

Ultrahigh Molecular Weight Polyethylene ◽

Coating Process ◽

Orthopaedic Implant ◽

Cohesive Failure ◽

Orthopaedic Implants ◽

Tin Coating ◽

Titanium Nitride Coating ◽

English Medical Literature

Surfaces of medical implants can be enhanced with the favorable properties of titanium-nitride (TiN). In a review of English medical literature, the effects of TiN-coating on orthopaedic implant material in preclinical studies were identified and the influence of these effects on the clinical outcome of TiN-coated orthopaedic implants was explored. The TiN-coating has a positive effect on the biocompatibility and tribological properties of implant surfaces; however, there are several reports of third body wear due to delamination, increased ultrahigh molecular weight polyethylene wear, and cohesive failure of the TiN-coating. This might be due to the coating process. The TiN-coating process should be optimized and standardized for titanium alloy articulating surfaces. The clinical benefit of TiN-coating of CoCrMo knee implant surfaces should be further investigated.

Download Full-text