Effect of nitrogen content on high-temperature stability of hard and optically transparent amorphous Hf-Y-Si-B-C-N coatings

Farhadizadeh, Alireza; Vlček, Jaroslav; Houška, Jiří; Haviar, Stanislav; Čerstvý, R.; Červená, Michaela; Zeman, Petr; Matas, Martin

doi:10.1016/j.ceramint.2022.10.250

Cited by 7 publications

(2 citation statements)

References 39 publications

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“…The Ta-Zr-Si-B-C and Ta-Zr-Si-B-N coatings were developed based on the high oxidation resistance of Ta-Si-B-C coatings [9] and the positive effect of nitrogen and zirconium on the oxidation resistance and thermal stability of silicide coatings [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Thermal Stability of Oxidation-Resistant Ta-Zr-Si-B-N and Ta-Zr-Si-B-C Coatings under In Situ TEM Heating and Vacuum Annealing

Sytchenko,

Loginov,

Levashov

et al. 2023

Applied Sciences

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Amorphous Ta-Zr-Si-B-C and Ta-Zr-Si-B-N coatings were deposited by magnetron sputtering using a ceramic target in Ar + C2H4 and Ar + N2 reaction media. Thermal stability under in situ TEM heating, vacuum annealing and nanoindentation, as well as the effect of heating on structural-phase transformations in coatings and their mechanical characteristics, have been studied. The results showed that the heating of amorphous Ta-Zr-Si-B-C and Ta-Zr-Si-B-N coatings in a TEM column leads to precipitation h-TaSi2 and c-TaC crystalline phases at a temperature of 600 °C and h-Ta5Si3 and c-TaN at a temperature of 1000 °C, respectively. Similar structural-phase transformations were revealed as a result of vacuum annealing. An increase in temperature from 20 to 1000 °C led to a decrease in the hardness of the carbon-containing coating from 21 to 16 GPa as a result of stress relaxation. For the Ta-Zr-Si-B-N coating at a temperature of 1000 °C, an increase in hardness was observed from 18 to 27 GPa, which is associated with the crystallization of the coating, with the formation of a nanocomposite structure with h-Ta5Si3 and c-TaN crystallites of 6–10 nm in size and an a-Si(Zr,B)N amorphous region.

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Section: Introductionmentioning

confidence: 99%

Thermal Stability of Oxidation-Resistant Ta-Zr-Si-B-N and Ta-Zr-Si-B-C Coatings under In Situ TEM Heating and Vacuum Annealing

Sytchenko,

Loginov,

Levashov

et al. 2023

Applied Sciences

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“…SiBCN thin-film coatings have not only high oxidation resistance but also high thermal stability up to a temperature of 1700 • C inclusive. The next round of research included the creation of SiBCN coatings doped with hafnium and rare earth metals: HfBSiCN with oxidation resistance up to 1600 • C [9], and HfYSiBCN [10] and HfHoSiBCN [11] with thermal stability and oxidation resistance up to 1300 • C and higher. In parallel, investigations were carried out on ZrSiB/SiBC [12] and MoSiB/SiBC [13] multilayer coatings providing oxidation resistance up to 1200 • C and 1500 • C, respectively.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Nitrogen Flow Rate on the Structure and Properties of Mo-Hf-Y-Si-B-N Coatings

Kiryukhantsev-Korneev,

Sytchenko,

Chudarin

et al. 2023

J. Compos. Sci.

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This work is devoted to the production of Mo-Hf-Y-Si-B-N coatings using magnetron sputtering with varying N2 flow rate; the analysis of magnetron discharge plasma; and the investigation of the structure, and optical, mechanical, and tribological characteristics, as well as crack resistance and oxidation resistance, of the coatings. The results show that Mo-Hf-Y-Si-B-N coatings were characterized by a dense, homogeneous structure. The non-reactive coatings had a maximum growth rate of 270 nm/min. An increase in the flow rate of N2 from 0 to 37.5 sccm led to a decrease in the growth rate by 5.4 times. Mo-Hf-Y-Si-B-N coatings were X-ray amorphous. In non-reactive coatings, the presence of Mo-Si and Mo-B bonds was revealed. The introduction of nitrogen contributed to the formation of an additional Si-N bond, an increase in the proportion of which led to an increase in transmittance. The Mo-Hf-Y-Si-B coating was characterized by a hardness value of 14 GPa. The maximum hardness of 16 GPa was observed in coatings obtained at nitrogen flow rates of 12.5 and 25.0 sccm. A further increase in the consumption of N2 to 37.5 sccm led to a decrease in hardness by 38%. The coating obtained at a flow rate of 25 sccm N2 was characterized by maximum elastic recovery of 57%, elastic strain to failure of 0.098, and resistance to plastic deformation of 0.157 GPa. An increase in nitrogen flow rate from 0 to 12.5 sccm contributed to a decrease in the wear rate of coatings under sliding friction conditions by 40%. The non-reactive Mo-Hf-Y-Si-B coating had the best oxidation resistance at 1000 °C.

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Fabrication and investigation of novel hafnium-zirconium carbonitride ultra-high temperature ceramics

Suvorova

Khadyrova

Непапушев

et al. 2023

Ceramics International

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Effect of nitrogen content on high-temperature stability of hard and optically transparent amorphous Hf-Y-Si-B-C-N coatings

Cited by 7 publications

References 39 publications

Thermal Stability of Oxidation-Resistant Ta-Zr-Si-B-N and Ta-Zr-Si-B-C Coatings under In Situ TEM Heating and Vacuum Annealing

Thermal Stability of Oxidation-Resistant Ta-Zr-Si-B-N and Ta-Zr-Si-B-C Coatings under In Situ TEM Heating and Vacuum Annealing

The Influence of Nitrogen Flow Rate on the Structure and Properties of Mo-Hf-Y-Si-B-N Coatings

Fabrication and investigation of novel hafnium-zirconium carbonitride ultra-high temperature ceramics

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