The effect of process parameters on rhenium diboride films deposited by PLD

Chrzanowska, Justyna; Hoffman, J.; Denis, Piotr; Giżyński, Maciej; Mościcki, Tomasz

doi:10.1016/j.surfcoat.2015.07.024

Cited by 18 publications

(11 citation statements)

References 29 publications

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“…The Re 0.85 B 2 film ( H exp = 32 GPa, E exp = 522 GPa) does, on average, exhibit a hardness which is lower than the average of previously reported values ( H lit = 38(11) GPa 4,13–18 ) and the elastic modulus is 21.7% lower than theoretically predicted ( E DFT = 667 GPa). The standard deviation on both quantities is with 25.7% relatively large.…”

Section: Resultscontrasting

confidence: 58%

“…4 reported a hardness of 48 GPa at 0.5 N indentation load which, however, decreased with increasing load down to 30 GPa at 5 N load. Other experimental studies report largely scattered values of measured hardness ( H = 38(11) GPa 4,13–18 , notation: average value (standard deviation on the last significant digits)). One reason for this scattering can be the presence Re 7 B 3 phase impurities which are often reported 17,19–22 and which highlight the necessity of obtaining phase-pure samples for a reliable characterization.…”

Section: Introductionmentioning

confidence: 99%

“…One reason for this scattering can be the presence Re 7 B 3 phase impurities which are often reported 17,19–22 and which highlight the necessity of obtaining phase-pure samples for a reliable characterization. Despite several of the studies mentioned above have suggested that ReB 2 may be a promising candidate for hard coating applications, only two studies have synthesized ReB 2 thin films by pulsed laser deposition 15,18 . Experiments employing methods which can be used on large industrial scales, such as magnetron sputtering, are yet lacking.…”

Section: Introductionmentioning

confidence: 99%

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Self-passivating (Re,Al)B2 coatings synthesized by magnetron sputtering

Bliem

Mráz

Sen

et al. 2018

Sci Rep

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(Re0.67Al0.10)B2 and (Re0.74Al0.11)B2 solid solution as well as Re0.85B2 thin films were deposited by hybrid RF-DC magnetron sputtering. X-ray diffraction (XRD) showed that all films exhibit the ReB2 (P63/mmc) crystal structure. X-ray photoelectron spectroscopy (XPS) analyses performed on atmosphere exposed thin film surfaces suggest that ReB2 corrodes, consistent with literature, by forming perrhenic acid (HReO4) already after two days, while (Re0.74Al0.11)B2 forms a self-passivating Al-oxide layer preventing corrosion in a time period ≥ 60 days. Hence, it is evident that Al additions to ReB2 significantly increase the chemical stability during atmosphere exposure.

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Section: Resultscontrasting

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Self-passivating (Re,Al)B2 coatings synthesized by magnetron sputtering

Bliem

Mráz

Sen

et al. 2018

Sci Rep

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“…Rhenium diboride (ReB 2 ) was synthesized for the first time in 1962, its crystalline structure is hexagonal with a = 0.2900 nm and c = 0.7478 nm, with 2 ReB 2 units per unit cell . Recently, ReB 2 has been classified as a superhard and incompressible material because it has hardness (20‐60 GPa), bulk modulus (173‐371 GPa), Young modulus (382‐712 GPa), and incompressibility along the c axis (00l planes), therefore, it has been proposed as material to be used in cutting and grinding tools. As was mentioned previously, the ReB 2 has superhard and incompressibility properties, but only 2 publications have reported its chemical properties.…”

Section: Introductionmentioning

confidence: 99%

Chemical stability of superhard rhenium diboride at oxygen and moisture ambient environmental conditions prepared by mechanical milling

et al. 2018

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In this study, rhenium diboride (ReB2) was obtained by mechanosynthesis at 640 minutes of milling. The obtained ReB2 was stored at oxygen and moisture ambient environmental conditions to know the chemical stability. The results indicate that ReB2 is totally decomposed at oxygen and moisture ambient environmental conditions. Furthermore, the X‐ray diffraction (XRD) analysis of ReB2 samples after 26 months of storage shows that the final products of degradation are HReO4 (liquid), H3BO3, HBO2, and ReO3. Finally, a schematic diagram of the degradation sequence of ReB2 at oxygen and moisture ambient environmental conditions is proposed and validated with a thermodynamic analysis.

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“…The second wide range of application is surface engineering application. The previous experiment revealed that the Re can improve hardness as well as wear resistance characteristic of material surface [16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Microstructural evaluation of Re particle reinforced composite on aluminium surface by friction stir processing

Węglowski¹,

Wrona²,

Nejman³

et al. 2018

Epitoanyag - JSBCM

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The paper presents the results of friction stir processing (FSP) process of cast aluminium alloy AlSi9Mg. The studies included a modification of the microstructure in the grain refinement, elimination of voids and the production of composite material AlSi9Mg + Re. Rhenium is famous for its refractory character, high density as well as high hardness. It is well known as alloying element for improvement of strength, plasticity, weldability, reduction of the degree of recrystallization embrittlement mainly in W, Mo and Ni based alloys. Re is used in superalloys as a solid-solution strengthening alloying element and increasing corrosion resistance at high temperatures. Rhenium containing alloys have high electrical resistivity and refractory character. The modification was carried out single-and multiple runs. The results show significant fragmentation in the mixing microstructure, and a metallic continuity. Fragmentation in the mixing microstructure was confirmed by SEM research. The study revealed that mechanical alloying technology FSP allows to increase the hardness of the material. The ability to produce graded materials AlSi9Mg alloy matrix by frictional treatment is also indicated.

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The effect of process parameters on rhenium diboride films deposited by PLD

Cited by 18 publications

References 29 publications

Self-passivating (Re,Al)B2 coatings synthesized by magnetron sputtering

Self-passivating (Re,Al)B2 coatings synthesized by magnetron sputtering

Chemical stability of superhard rhenium diboride at oxygen and moisture ambient environmental conditions prepared by mechanical milling

Microstructural evaluation of Re particle reinforced composite on aluminium surface by friction stir processing

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