Tribological Behavior of NiTi Alloy Produced by Spark Plasma Sintering Method

Samal, Sneha; Cibulková, Jana; Čtvrtlík, Radim; Tomáštík, Jan; Vaclavek, Lukáš; Kopeček, Jaromı́r; Šittner, Petr

doi:10.3390/coatings11101246

Cited by 17 publications

(8 citation statements)

References 44 publications

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“…Plasma spraying has been used in various materials for coating purposes including NiTi powders [ 16 , 17 , 18 ]. Interfacial adhesion of functional coating has a significant influence on composite behavior in various sensitive environmental applications [ 19 ]. Materials used in various applications face the challenge of withstanding erosion and corrosion in extreme environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Adhesion of Thick NiTi Coating on Substrate Stainless Steel

2022

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Interfacial adhesion of thick NiTi coating on substrate stainless steel is investigated here. NiTi coating was deposited on the substrate by using the thermal plasma spraying method. Deposition of NiTi coating was carried out by using various levels of input power under an Ar atmosphere. Multiple coating layers were deposited on the stainless steel surface for a specific thickness. The cross-section of the plasma-sprayed samples were prepared and characterized by using various techniques. The hardness of the coating layers on the surface and cross-section was examined. The thickness of the coating increased with the increase in power. No cracks were detected in the interface for the NiTi coating deposited at 12 kW power. However minor pores were observed at some regions along the interface at the sample prepared at 9 kW power. A good-quality coating layer was formed at the interface of the substrate. Primary phases of austenite and martensite were confirmed from the EBSD and XRD investigations. There was the presence of intermetallic and oxide phases in the coating layers. A less heat-affected zone of 10 µm of along the interface was confirmed without any diffusion of elements from the substrate to the coating layers. There was homogenous distribution elemental composition of Ni and Ti throughout the coating layers.

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Section: Introductionmentioning

confidence: 99%

Interfacial Adhesion of Thick NiTi Coating on Substrate Stainless Steel

2022

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“…The formation of diffusion coatings like nickel titanium compound (NiTi) has also drawn significant attention to combat wear [13][14][15][16]. NiTi intermetallic shows pseudoelasticity behavior [17,18] which is elastic responses to applied stresses, due to reversible martensitic phase transformation [19], and this leads to the superior hardness and wear resistance [20,21]. A number of research groups have employed various techniques to fabricate NiTi intermetallic as reliable protective layers on titanium and its alloys [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Study of the Tribological Properties of Diffusion Coated NiTi Intermetallic on Cp Titanium

Khosravi¹,

Sohi²,

Ghasemi³

et al. 2022

Tribol. Ind.

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In this work, dry tribological behaviors of commercial pure (Cp) titanium and diffusion coated titanium were studied and compared. Wear tests were performed by a pin on disk tribometer using 52100 steel pins, under various loads of 10, 20, and 40 N. Worn surfaces were examined by scanning electron microscope, equipped with EDS analyzer. The wear rates of the coated materials were lower than those of the Cp titanium. This is mainly attributed to the higher hardness of the NiTi layer (about 280 HV) which is 1.5 times higher than that of the untreated titanium (about 180 HV). In addition, the SEM analysis of the worn surfaces revealed that the formation of tribological layer on the surface of the diffusion treated material effectively lowered the wear rate. The results also demonstrated a lower coefficient of friction in the treated specimens compared to those of the Cp materials.

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“…However, during the determination of the mentioned coefficients, it is the calculation of isobaric reaction potential at the temperature at which the cutting tool is operated that can become an important element in modeling the fracture of multilayer coatings and developing the coatings with optimal properties. Similar problems in relation to the NiTi coating were considered in [81,82].…”

Section: Discussionmentioning

confidence: 91%

Investigation of Properties of the Zr,Hf-(Zr,Hf)N-(Zr,Hf,Me,Al)N Coatings, Where Me Means Cr, Ti, or Mo

Vereschaka¹,

Sitnikov²,

Волосова

et al. 2021

Coatings

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The article describes the results of the investigation focused on the properties of the Zr,Hf-(Zr,Hf)N-(Zr,Hf,Me,Al)N coatings, where Me means chromium (Cr), titanium (Ti), or molybdenum (Mo). These coatings have three-layer architecture, including adhesion, transition, and wear-resistant layers, while the latter, in turn, has a nanolayer structure. Despite the fact that the coatings under study have close values of hardness and critical fracture load LC2, there are noticeable differences in wear resistance during the turning of steel. The tools with the coatings under study demonstrated better wear resistance compared to an uncoated tool and the tool with the commercial ZrN coating. The best wear resistance was detected for a tool with the Zr,Hf-(Zr,Hf)N-(Zr,Hf,Ti,Al)N coating. The study of the pattern of cracking in the structure of the coatings has found that, during the cutting process, active cracking occurs in the coating with Cr, which leads to the fracture of the coating, while the process of cracking is noticeably less active in the coatings with Ti or Mo.

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Tribological Behavior of NiTi Alloy Produced by Spark Plasma Sintering Method

Cited by 17 publications

References 44 publications

Interfacial Adhesion of Thick NiTi Coating on Substrate Stainless Steel

Interfacial Adhesion of Thick NiTi Coating on Substrate Stainless Steel

Study of the Tribological Properties of Diffusion Coated NiTi Intermetallic on Cp Titanium

Investigation of Properties of the Zr,Hf-(Zr,Hf)N-(Zr,Hf,Me,Al)N Coatings, Where Me Means Cr, Ti, or Mo

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