Effects of the tantalum intermediate layer on the nanomechanical properties and biocompatibility of nanostructured tantalum/tantalum nitride bilayer coating deposited by magnetron sputtering on the nickel titanium alloy

TaNx coatings were deposited by RF magnetron sputtering with different bias voltages. The growth morphology, crystalline structure, chemical bond structure, hardness and elastic modulus, adhesion strength and tribological performance of the coatings were studied as a function of the bias voltage. The results showed that an increasing bias voltage refines the coating grains and facilitates structure densification. Simultaneously, the structure of the TaNx coatings transfers from a composite structure consisting of TaN and Ta2N crystals, through a single composite mainly composed of the Ta2N crystal, to an amorphous structure as the bias voltage increases from low to high, indicating that the phase composition of the TaNx coatings can be varied by the bias voltage. The coating composed of Ta2N crystal showed a good overall performance including enhanced hardness, enhanced adhesive strength, and good tribological performance with enhanced wear resistance and a low friction coefficient of 0.18.

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Determination of corrosion rate of orthodontic wires based on nickel-titanium alloy in artificial saliva

Materialwissenschaft und Werkstofftechnik ◽

10.1002/mawe.201400201 ◽

2014 ◽

Vol 45 (2) ◽

pp. 99-105 ◽

Cited By ~ 6

Author(s):

V. Katić ◽

L. Ćurković ◽

M. Ujević Bošnjak ◽

S. Špalj

Keyword(s):

Titanium Alloy ◽

Corrosion Rate ◽

Artificial Saliva ◽

Nickel Titanium ◽

Orthodontic Wires

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Investigation of the properties of BiFeO3/intermediate-layer structures fabricated by magnetron sputtering

Physics of the Solid State ◽

10.1134/s1063783415090139 ◽

2015 ◽

Vol 57 (9) ◽

pp. 1764-1771

Author(s):

A. S. Kamzin ◽

L. S. Kamzina ◽

H. W. Chang ◽

Y. C. Yu ◽

S. Y. Tu

Keyword(s):

Magnetron Sputtering ◽

Intermediate Layer ◽

Layer Structures

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Shape memory alloy based NiTi reinforced functionally graded material for vibration damping

Proceedings of the Institution of Mechanical Engineers Part L Journal of Materials Design and Applications ◽

10.1177/14644207211035521 ◽

2021 ◽

pp. 146442072110355

Author(s):

Namrata Gangil ◽

Arshad Noor Siddiquee ◽

Sameera Mufazzal ◽

SM Muzakkir ◽

Sachin Maheshwari

Keyword(s):

Titanium Alloy ◽

Shape Memory ◽

Functionally Graded Material ◽

Friction Stir Processing ◽

Vibration Damping ◽

Functionally Graded ◽

Nickel Titanium ◽

Friction Stir ◽

Alloy Particles ◽

Graded Material

Shape memory based high performance nickel-titanium alloy particles were embedded by friction stir processing in graded concentration on the surface of light weight commercially pure magnesium cast plates. The novel functionally graded material so developed was analyzed for microhardness evolution and vibration damping effect. The nickel-titanium alloy particles were filled in a 2.5 wide × 3 mm deep slot and embedded on the surface by friction stir processing. A shallower slot 2.5 wide × 1.5 mm deep was milled over the previously embedded surface in which nickel-titanium alloy powder was again filled and embedded on the surface by second pass friction stir processing. This sequence of pass created the graded variation in nickel-titanium alloy concentration. The so fabricated functionally graded material was cut out from the plate and it was hot-forged to 2/3 thickness and subsequently quenched. The microstructural examination confirmed homogeneous dispersion of nickel-titanium alloy particles and clear interface between high and low concentration regions. The microhardness confirmed a uniform graded variation in hardness. The vibration damping tests confirm considerable improvement in the damping capacity of the fabricated functionally graded material.

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