Comparative Investigations of AlCrN Coatings Formed by Cathodic Arc Evaporation under Different Nitrogen Pressure or Arc Current

Tools and machine surfaces are subjected to various types of damage caused by many different factors. Due to this, the protecting coatings characterized by the best properties for a given treatment or environment are used. AlCrN coatings with different compositions, synthesized by different methods, are often of interest to scientists. The aim of the presented work was the deposition and investigation of two sets of coatings: (1) formed in nitrogen pressure from 0.8 Pa to 5 Pa and (2) formed at arc current from 50 A to 100 A. We study relationships between the above technological parameters and discuss their properties. Coatings formed at nitrogen pressure (pN2) up to 3 Pa crystallize both in hexagonal AlN structure and the cubic CrN structure. For pN2 > 3 Pa, they crystallize in the CrN cubic structure. Crystallite size increases with nitrogen pressure. The coatings formed at different arc currents have a cubic CrN structure and the crystallite size is independent of the current. The adhesion of the coatings is very good, independent of nitrogen pressure and arc current.

Download Full-text

Structure, morphology and mechanical properties of AlCrN coatings obtained by the method of cathodic arc evaporation

Inżynieria Powierzchni ◽

10.5604/01.3001.0012.2336 ◽

2018 ◽

Vol 23 (2) ◽

pp. 61-69

Author(s):

Adam Gilewicz ◽

Roman Jędrzejewski ◽

Piotr Myśliński ◽

Bogdan Warcholiński

Keyword(s):

Deposition Rate ◽

Bias Voltage ◽

Roughness Parameter ◽

Nitrogen Pressure ◽

Negative Bias ◽

Negative Bias Voltage ◽

Substrate Bias Voltage ◽

Cathodic Arc Evaporation ◽

Arc Evaporation ◽

Cathodic Arc

CrAlN coatings have been formed on steel substrates (HS6-5-2) using cathodic arc evaporation. The influence of nitrogen pres-sure and substrate bias voltage on the properties of CrAlN coatings formed from Al80Cr20 cathode, such as: chemical and phase composition of the coatings, their surface morphology, deposition rate, hardness and adhesion to the substrate have been investigated. It has been determined that the rate of the deposition of coatings in the nitrogen atmosphere with the pressure of 3 Pa is the highest and that with the increase of the negative bias voltage of the substrate the deposition rate decreases. The roughness parameter Ra of the coating surface decreases as the nitrogen pressure increases during their formation. Presumably, this is related to the reduction of the amount of macroparticles on the surface of the coating. The hardness of the coatings (taking into account the measurement uncertainty) is independent of the nitrogen pressure, but it increases with the increase of the negative bias voltage of the substrate. The adhesion of the coating increases with the increase of the nitrogen pressure to 3–4 Pa, and then it decreases. The increase in the negative bias voltage of the substrate during the formation of the coating deteriorates its adhesion to the substrate.

Download Full-text

Comparison of corrosion, physico-mechanical and wear properties of TiN, ZrN, TixZr1-xN and Ti1-xAlxN coatings

MATEC Web of Conferences ◽

10.1051/matecconf/202032902029 ◽

2020 ◽

Vol 329 ◽

pp. 02029

Author(s):

Anna Kameneva ◽

Vadim Karmanov ◽

Sergey Stepanov ◽

Darya Kameneva

Keyword(s):

Elastic Recovery ◽

Multilayer Coating ◽

Wear Intensity ◽

Technological Parameters ◽

Wear Properties ◽

Corrosion Properties ◽

Cathodic Arc Evaporation ◽

Passive Current ◽

Arc Evaporation ◽

Cathodic Arc

In this paper, TiN, ZrN, TixZr1-xN, Ti1-xAlxN coatings were obtained by cathodic arc evaporation at optimal technological parameters. The corrosion properties of these coatings were investigated in 5% NaOH. The coating ZrN deposited by cathodic arc evaporation slows down the corrosion in the 5% NaOH by over 3,000 times, and the passive current – by 2,000 times. The TixZr1-xN coating has the best physico-mechanical properties: microhardness Н = 36 GPa, Young’s modulus Е = 312 GPa, elastic recovery We = 78 %, resistance to elastic failure strain H/E = 0.12, and resistance to plastic strain H3/E2 = 1.31 GPa. The Ti1-xAlxN coating has the best wear properties: friction coefficient 0.09, counterbody wear intensity by volume 0.43•10-8 mm3/Nm, coating wear intensity by volume 0.05•10-4 mm3/Nm and by mass•0.03•10-5 mg/Nm. Multilayer coating TiN-TixZr1-xN-Ti1-xAlxN-ZrN (ZrN-top layer) has a complex of high physico-mechanical and wear properties in 5% NaOH.

Download Full-text

Effect of nitrogen pressure and substrate bias voltage on the properties of Al–Cr–B–N coatings deposited using cathodic arc evaporation

Tribology International ◽

10.1016/j.triboint.2020.106744 ◽

2021 ◽

Vol 154 ◽

pp. 106744

Author(s):

B. Warcholinski ◽

A. Gilewicz ◽

P. Myslinski ◽

E. Dobruchowska ◽

D. Murzynski ◽

...

Keyword(s):

Bias Voltage ◽

Nitrogen Pressure ◽

Substrate Bias ◽

Substrate Bias Voltage ◽

Cathodic Arc Evaporation ◽

Arc Evaporation ◽

Cathodic Arc

Download Full-text

Structure and Properties of AlCrN Coatings Deposited Using Cathodic Arc Evaporation

Coatings ◽

10.3390/coatings10080793 ◽

2020 ◽

Vol 10 (8) ◽

pp. 793 ◽

Cited By ~ 1

Author(s):

Bogdan Warcholinski ◽

Adam Gilewicz ◽

Piotr Myslinski ◽

Ewa Dobruchowska ◽

Dawid Murzynski

Keyword(s):

Bias Voltage ◽

Roughness Parameter ◽

Nitrogen Pressure ◽

Preferential Orientation ◽

Substrate Bias ◽

Substrate Bias Voltage ◽

X Ray ◽

Cathodic Arc Evaporation ◽

Arc Evaporation ◽

Cathodic Arc

Al–Cr–N coatings were formed at various nitrogen pressures, substrate bias voltages and substrate temperatures using cathodic arc evaporation. The relationship between technological parameters and properties of the coatings was investigated. The phase and chemical composition of the coatings, roughness, hardness, adhesion and thermal stability were analyzed by X-ray diffraction (XRD), scanning electron microscope (SEM), Energy-dispersive X-ray spectroscopy (EDX), micro-indenter, Rockwell, scratch tester and thermomechanical methods. The corrosion resistance of selected coatings was also investigated. XRD analysis indicates that the coatings crystallize in a cubic structure and show preferential orientation (200) CrN. With the increase of nitrogen pressure, the preferential orientation changes to (111). EDX analysis shows that as nitrogen pressure increases, the Al/(Al + Cr) rate decreases. Microscopic observations indicate that the number of macroparticles reduces as nitrogen pressure increases. As a result, the surface roughness parameter Ra of the coatings decreases. The effects of deposition temperature, nitrogen pressure and substrate bias voltage on the mechanical and tribological properties of the coatings were investigated. It was found that the above parameters influence the mechanical properties in different ways. The hardness and adhesion of coatings formed at higher temperatures was lower. Coatings formed under a higher nitrogen pressure or substrate bias voltage were characterized by higher hardness and better wear resistance.

Download Full-text