Plasma Spray Deposition of HA-TiO2 on β-phase Ti-35Nb-7Ta-5Zr Alloy for Hip Stem: Characterization of Bio-mechanical Properties, Wettability, and Wear Resistance

2020 ◽  
Vol 17 (5) ◽  
pp. 1029-1044 ◽  
Author(s):  
Harjit Singh ◽  
Chander Prakash ◽  
Sunpreet Singh
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Plasma Spray ◽  
Spray Deposition ◽  
Β Phase

Effect of Processing Parameters on the Wear Resistance of Thermally Sprayed Epoxy Coatings

1996 ◽  
Author(s):  
Y. Bao ◽  
D.T. Gawne
Keyword(s):  
Wear Resistance ◽  
Heat Flow ◽  
Plasma Spray ◽  
Spray Deposition ◽  
Processing Parameters ◽  
Crosslinking Reaction ◽  
Epoxy Coatings ◽  
Substrate Preheating ◽  
Low Wear ◽  
Thermally Sprayed

Abstract Plasma spray deposition of epoxies under normal conditions produces coatings with low wear resistance. The research shows that the difficulty in achieving satisfactory properties is a result of the rapid heat flow from the coating to the substrate, which suppresses the crosslinking reaction. The results indicate that the use of substrate preheating or ceramic undercoats enhances the wear resistance by promoting the curing reaction during spraying.

Characterization of Ti-xNb (x = 25 – 35) Alloys in as Melt and Annealed States

2019 ◽  
Vol 946 ◽  
pp. 287-292
Author(s):  
Alexander Thoemmes ◽  
Ivan V. Ivanov ◽  
Alexey Ruktuev
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Β Phase ◽  
Α Phase ◽  
Nb Content ◽  
Scanning Electron

The effect of Nb content on microstructure, mechanical properties and phase formation in as-melt and annealed binary Ti-Nb alloys were investigated using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD) analysis. The content of Nb varied in the range 25-35 mass % leading to significant changes in the microstructure. The annealed and furnace-cooled binary Ti-Nb samples exhibited HCP martensitic α` phase at a Nb content below 27.5 mass % and metastable BCC β phase at higher contents of Nb. The mechanical properties of alloys depended strongly on the Nb content and type of the dominating phase.

Characterization of Nickel Based Alloys (Hard Facing Alloys) with Additions of Ti and Mo

2011 ◽  
Vol 312-315 ◽  
pp. 199-204
Author(s):  
K. Khenfer ◽  
S. Lebaili ◽  
S. Hamar-Thibault
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Chemical Composition ◽  
Abrasive Wear ◽  
Mechanical Engineering ◽  
Significant Proportion ◽  
Heterogeneous Materials ◽  
Engineering Industry ◽  
Wear And Corrosion

The mechanical engineering industry is always in the search of new hardfacing alloys which nowadays make it possible to solve considerable delicate problems of abrasive wear and corrosion. These alloys are heterogeneous materials and are generally composed of a ductile matrix and a significant proportion in hard phases (carbides, borides or silicides), which give a good wear resistance and corrosion. The following studies made on alloys containing Ni, rich in Silicon and tungsten. We noted that addition of these elements (Si and W) got interesting mechanical properties. The alloys that we chose for this study contain the elements C, B, Si, Cr and W with additions in Ti and Mo. The aim of this work is the characterisation of the various phases formed during solidification, to study chemical affinities in this system poly-constitutes and to make a correlation between the chemical composition, the conditions of development and the microstructures obtained.

Surface Modification Effects on Microstructure and Mechanical Properties of Bio-Titanium Alloys

2017 ◽  
Vol 909 ◽  
pp. 199-204 ◽  
Author(s):  
Ahmed Zaki ◽  
Shimaa El-Hadad ◽  
Waleed Khalifa
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Surface Modification ◽  
Titanium Alloys ◽  
Thermal Oxidation ◽  
Surface Properties ◽  
Equiaxed Microstructure ◽  
Hard Layer ◽  
Β Phase ◽  
Ti64 Alloy

Ti-6Al-7Nb (Ti67) alloy has recently been developed to replace the commercial Ti6Al4V (Ti64) alloy because of the reported cytoxicity of vanadium. Surface modification by thermal oxidation is used to enhance the hardness and wear resistance of such titanium alloys. Since Ti67 alloy contains Nb as β phase stabilizer instead of V in Ti64, it is expected to behave differently upon processing by thermal oxidation. Therefore, it is of interest to compare the response of the two alloys to thermal oxidation in terms of hardness and wear resistance. Forged and cast samples were used to study the influence of the microstructure on the surface properties after oxidation. The forged samples with their equiaxed microstructure showed a well developed sub-surface hard layer (α-case) compared to the cast structure for the two alloys. The thickness of this case in Ti64 after oxidation at (900-1100 °C) was greater than in Ti67. This resulted in higher wear resistance of the Ti64 alloy relative to Ti67. These results are worth considering when designing implants for joints replacement.

scholarly journals A comparative study of electrospun polyvinylidene fluoride and poly(vinylidenefluoride-co-trifluoroethylene) fiber webs: Mechanical properties, crystallinity, and piezoelectric properties

2020 ◽  
Vol 15 ◽  
pp. 155892502093929 ◽  
Author(s):  
Wenxin Zhang ◽  
Bilal Zaarour ◽  
Lei Zhu ◽  
Chen Huang ◽  
Bugao Xu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Comparative Study ◽  
Polyvinylidene Fluoride ◽  
Piezoelectric Properties ◽  
Energy Scavenging ◽  
Phase Content ◽  
Β Phase ◽  
Accurate Comparison ◽  
Fabrication And Characterization

Energy scavenging has been attracting the consideration of researchers in recent years. In this study, the fabrication and characterization of electrospun randomly oriented and aligned grooved polyvinylidene fluoride (PVDF) and poly(vinylidenefluoride-co-trifluoroethylene) (PVDF-TrFE) fiber webs are studied. The fibers are generated with comparable diameters and the webs which are used as an active layer to directly make a piezoelectric nanogenerator are fabricated with the same thickness for accurate comparison. The results show that PVDF-TrFE fiber webs have better mechanical properties, crystallinity, and piezoelectric properties than PVDF fiber webs. Furthermore, the piezoelectric nanogenerator based on PVDF-TrFE fiber webs has higher electrical outputs than piezoelectric nanogenerator based on PVDF fiber webs owing to its high β phase content (F(β)). Moreover, the electrical outputs of the piezoelectric nanogenerator based on aligned fiber webs are higher than those based on randomly oriented fiber webs due to the increase in the friction area. We believe that our work can be served as a good reference for the comparison between the mechanical, physicochemical, and piezoelectric properties of PVDF and PVDF-TrFE fiber webs generated via electrospinning.

Plasma spray deposition and characterization of strontium zirconate coatings

2014 ◽  
Vol 40 (7) ◽  
pp. 10441-10446 ◽  
Author(s):  
A. Pragatheeswaran ◽  
P.V. Ananthapadmanabhan ◽  
Y. Chakravarthy ◽  
Subhakar Bhandari ◽  
T.K. Thiyagarajan ◽  
...  
Keyword(s):  
Plasma Spray ◽  
Spray Deposition ◽  
Strontium Zirconate
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