Surface modifications of TiN coating by the pulsed TEA CO2 and KrCl laser

Trtica, M.; Тарасенко, В. Ф.; Gaković, B.; Fedenev, Andrei V.; Petkovska, Ljubica T.; Radak, B.; Lipatov, E. I.; Шулепов, М. А.

doi:10.1016/j.apsusc.2003.10.048

Cited by 21 publications

(10 citation statements)

References 24 publications

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“…The effect of μs pulses generated with a CO 2 laser on TiN coatings demonstrated a melt dominant material removal mechanism [9][10][11], although the resulting machining quality was far from that required for high-precision micromachining. It was reported that ns pulses generated with KrCl (λ = 222 nm) [10] and XeCl (λ = 308 nm) [11] excimer lasers generated significantly smaller melt fractions generated in comparison to μs pulses. Kononenko et al [12] compared the effect of ns and ps pulse durations using combinations of UV (270 nm), visible (539 nm), and IR (1078 nm) wavelengths.…”

Section: Introductionmentioning

confidence: 98%

Laser micromachining of TiN coatings with variable pulse durations and shapes in ns regime

Demir

Pangovski

O’Neill

et al. 2014

Surface and Coatings Technology

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Section: Introductionmentioning

confidence: 98%

Laser micromachining of TiN coatings with variable pulse durations and shapes in ns regime

Demir

Pangovski

O’Neill

et al. 2014

Surface and Coatings Technology

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“…Many research projects have been conducted to convert laser power into quantitative thermal energy. 10,11 The ratio of interstitial and substitutional carbons could be adjusted to improve the hardness, wear resistance, and elastic modulus in the carbon-doped TiZrN coating. So, it is important to study the behavior of doping carbon in terms of the electronic structure and the bonding state.…”

Section: Introductionmentioning

confidence: 99%

Carbon depth profile and internal stress by thermal energy variation in carbon‐doped TiZrN coating

Hong

Kim

et al. 2020

J. Am. Ceram. Soc.

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Diffusion and bonding behavior of the doped carbon by variation of thermal energy was investigated in terms of carbon depth profile and local atomic structure. The thermal energy of pulsed laser was limited to the range of 20%~50% to dope the carbon and prevent degradation of the coating layer with laser carburization. The doped carbon was confirmed to be distributed to a depth of around 20 nm from the surface at 20% thermal energy by ToF-SIMS analysis. Carbon diffused at about 400 nm with 50% thermal energy, and most of the carbon spread from the surface to around 80 nm. The EXAFS analysis represented that the peak of the interstitial carbon site was formed at 20% and the ZrN peak shifted toward the ZrC peak by increasing the thermal energy. The analysis of the electronic structure and the bonding state demonstrated that the proportion of substitutional carbon was about 21% at a thermal energy of 50%. The internal stress was calculated using HR-XRD with a 5-axes sample stage, which was −453 MPa before doping and then increased to −1494 MPa at 50% because the mixture of interstitial and substitutional carbon increased distortion inside the coating layer. The elastic modulus and hardness were 459 and 37.9 GPa at 50%, respectively, which were improved by 10% and 20% compared to those of the TiZrN coating.

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“…and Shinn M. studied the process of laser nitriding of metals by different lasers with the wavelengths in a range from 0.3-3.0 µm [51]. They found that for some metals the wavelength strongly effects the irradiation and efficiency of the nitriding process.…”

Section: Introductionmentioning

confidence: 99%

“…However, commonly reported problems refer to cracking of hard nitrided surface layers, and also to excessive roughness of such layers. Despite many years of research, the problem is still present, as evidenced by the number of publications that still appear in the world literature [1][2][3][21][22][23][24][25][26][27][28][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Titanium Metal Matrix Composite Surface Layers Produced During Laser Gas Nitriding of Ti6Al4V Alloy by Different Types of Lasers

Lisiecki¹

2016

Archives of Metallurgy and Materials

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The article presents the results of a comparative study of the nitriding process of titanium alloy substrate using two lasers with different characteristics of laser beams. One of the applied lasers was a high power diode laser emitting at a dominant wavelength of 808 nm, with a rectangular laser beam spot, and multimode energy distribution across the spot. The second laser was a solid state Yb:YAG disk laser emitting at a wavelength of 1.03 µm, with a circular beam spot, characterized by near Gaussian energy distribution across the spot. In a case of both lasers single stringer beads with a similar width and at similar energy input were produced. As a result of melting of the substrate with a laser beam in a pure gaseous nitrogen atmosphere composite surface layers with in situ precipitated titanium nitrides embedded in the metallic matrix of titanium alloy were produced, in both cases. However, the surface topography and structure is different for the surface layers produce by different lasers at the same processing parameters and width of laser beams.

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Surface modifications of TiN coating by the pulsed TEA CO2 and KrCl laser

Cited by 21 publications

References 24 publications

Laser micromachining of TiN coatings with variable pulse durations and shapes in ns regime

Laser micromachining of TiN coatings with variable pulse durations and shapes in ns regime

Carbon depth profile and internal stress by thermal energy variation in carbon‐doped TiZrN coating

Comparison of Titanium Metal Matrix Composite Surface Layers Produced During Laser Gas Nitriding of Ti6Al4V Alloy by Different Types of Lasers

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