Oxidation resistance of refractory γ-TiAlW coatings

Kaczmarek, Ł.; Wendler, B.; Siniarski, D.; Ryski, A.; Bieliński, Dariusz M.; Dobrowolski, O.; Lipiński, Piotr

doi:10.1016/j.surfcoat.2006.08.144

Cited by 13 publications

(7 citation statements)

References 16 publications

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“…Summing up, it can be stated that carbon layers have a beneficial effect by increasing the corrosion resistance of the alloy. This is in agreement with the reports by other authors, in which different alloys coated with carbon layers are studied and which demonstrate an improvement of the corrosion resistance in a body fluid environment [25,[37][38][39][40].…”

Section: Discussionsupporting

confidence: 93%

“…In addition, J.S. Viswanathan, applying carbon layers in his research, has improved the corrosion resistance of alloy Ni-Ti and increased its biocompatibility [25]. Reducing the corrosion and thus also the number of released metal substrate ions can also, as in the case of e.g., Ti(CN) type coatings, contribute to the improvement in biocompatibility of coated metal elements [19][20][21][22].…”

Section: Discussionmentioning

confidence: 99%

“…They can significantly limit the release of metal ions into the surrounding environment [22]. Among the many available methods of coating synthesis, medical applications often involve covering the surfaces with layers deposited from the gaseous phase [15,[23][24][25][26][27]. One of the most interesting techniques is the application of carbon layers [26,27].…”

Section: Introductionmentioning

confidence: 99%

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Carbon Coatings Deposited on Prosthodontic Ni-Cr Alloy

2021

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The study discusses the results of investigations conducted on carbon coatings applied on a prosthodontic alloy Ni-Cr. Carbon coatings with the thickness of about 1000 nm were deposited by means of the RF PACVD method with a titanium interlayer applied by magnetron spray dispersion. The coatings underwent microscopic examinations, as well as structural tests with the use of Raman spectrometry, investigations of mechanical properties, adhesion and corrosion tests; also, the bacterial adhesion to the sample surface was determined. It can be inferred from the performed studies that the obtained carbon coatings exhibit mechanical properties which allow them to be used for prosthodontic elements. The coatings’ adhesion to the metallic substrate made of Ni-Cr alloy equaled about 150 mN. The examined coatings clearly improve the corrosion resistance and reduce the number of bacteria adhering to the sample surfaces. Taking all this into account, it can be stated that carbon coatings can be potentially applied to protect metal prosthetic restorations.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Carbon Coatings Deposited on Prosthodontic Ni-Cr Alloy

2021

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“…Such research is conducted with coatings (oxide, carbon, nitride, carbide, etc.) used to cover the alloys of various metals [ 13 , 14 , 15 , 16 , 17 ]. The conducted research showed that the application of such coatings reduces the harmful effects of nickel, so these alloys can be confidently used after appropriate surface treatment [ 18 , 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of SiC Abrasive Blasting Parameters on the Quality of the Ceramic and Ni-Cr Dental Alloy Joint

et al. 2022

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The SiC abrasive blasting parameters are vital in ensuring a suitable bond between dental ceramics and the Ni-Cr alloy. The purpose of this in vitro test was to examine the strength of the joint between the Ni-Cr alloy and fused dental ceramics for SiC abrasive blasting at a specific pressure (400, 600 kPa) and particle size (50, 110, 250 µm) in order to determine the optimal treatment parameters. The test also accounted for thermal loads (5000 cycles, 5–55 °C) to which the metal-ceramic joint is subjected during use. One hundred and forty-four Ni-Cr cylinders were divided into six groups (n = 12) and subjected to the airborne-particle abrasion with SiC with various pressure and grit size parameters. After treatment, the specimens were rinsed, dried, fused to dental ceramics, and examined for their shear strength using the Zwick/Roell Z020 machine. The results were statistically analysed using the ANOVA analysis of variance (α = 0.05). The highest metal-ceramic joint strength was obtained for abrasive blasting with 110 and 250 µm SiC grit at a pressure of 400 kPa. This relationship was also observed after the joint was subjected to thermal loads (5000 thermocycles). Additionally, thermal loads did not significantly reduce the joint’s strength compared with non-loaded joints. For small SiC abrasive grit sizes (50 µm) under pressure 400 kPa, the treatment pressure had a significant effect on the strength of the joint (p < 0.05). For larger particle sizes, the pressure had no effect. After abrasive blasting using SiC, the Ni-Cr metal-ceramic joint retained its properties, even under thermal load, ensuring the joint properties’ stability during use.

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“…In recent years, many materials with rhombohedral structure have attracted many researcher's attention. For instance, sapphire (α-Al 2 O 3 ) is an infrared window material with excellent comprehensive performance [1] , and it is also a substrate material for the epitaxial preparation of ferroelectric materials [2,3] ; α-Al 2 O 3 is the main composition phase of scale on the surface of TiAl-based alloy, which contributes to the oxidation resistance at high temperature [4,5] ; ruby, based on α-Al 2 O 3 , is an important laser material; Ti-doped sapphire is widely used as important working crystal for tunable lasers and ultra-fast, high power light pumping. Zr-or Hf-doped BaTiO 3 is a new type of piezoelectric ceramic with stable rhombohedral phase above room temperature [6] .…”

mentioning

confidence: 99%

Ordered structures of rhombohedral system

Song

Jiang

2008

Chin. Sci. Bull.

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Lattice gas model is presented for rhombohedral lattice. Seven ordered structure types and four perfectly ordered structures are determined using concentration wave theory. The ordered structures of cation in corundum-type dimetal trioxides are predicted and reasonable explanations for typical experimental results are given.rhombohedral crystal, concentration wave, ordered structure, corundumRhombohedral system is one of the seven crystal systems. In recent years, many materials with rhombohedral structure have attracted many researcher's attention. For instance, sapphire (α-Al 2 O 3 ) is an infrared window material with excellent comprehensive performance [1] , and it is also a substrate material for the epitaxial preparation of ferroelectric materials [2,3] ; α-Al 2 O 3 is the main composition phase of scale on the surface of TiAl-based alloy, which contributes to the oxidation resistance at high temperature [4,5] ; ruby, based on α-Al 2 O 3 , is an important laser material; Ti-doped sapphire is widely used as important working crystal for tunable lasers and ultra-fast, high power light pumping. Zr-or Hf-doped BaTiO 3 is a new type of piezoelectric ceramic with stable rhombohedral phase above room temperature [6] . The r-BN is the precursor of new superhard materials c-BN [7] ; metastable rhombohedral α-Ga 2 O 3 has a smaller energy gap indicating very different photoelectric performance [8] . Recently, multi-component ordered solid solution has become one of the important fields for the investigation of these materials, for the performances of materials are determined by their structures. For instance, transition metal doped corundum type of α-Al 2-x T x O 3 (T = Sc, Y, La, Ac; x=0.5) crystals are high k-gate dielectric materials [9,10] ; corundum type solid solution α-FeAlO 3 were reported [11] . The investigations on multi-component coatings and composite coatings for oxidation resistance at high temperature [12][13][14] as well as on the property of other corundum type solid solution [15,16] are all hot points of materials research.Theoretically, while the main ordered structure types of cubic system [17][18][19] and hexagonal system [20,21] have been determined, the results about rhombohedral system have seldom been reported. Therefore, it is necessary to study the ordered structure types of rhombohedral system theoretically, which can give useful instruction to the research of related materials.

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Oxidation resistance of refractory γ-TiAlW coatings

Cited by 13 publications

References 16 publications

Carbon Coatings Deposited on Prosthodontic Ni-Cr Alloy

Carbon Coatings Deposited on Prosthodontic Ni-Cr Alloy

Effect of SiC Abrasive Blasting Parameters on the Quality of the Ceramic and Ni-Cr Dental Alloy Joint

Ordered structures of rhombohedral system

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