Microstructure and Wear Behavior of Alumina Ceramics for Joint Prostheses

2000 ◽  
Vol 2000.1 (0) ◽  
pp. 427-428
Author(s):  
Yoshinori SAWAE ◽  
Teruo MURAKAMI ◽  
Shunzou TASHIMA ◽  
Toshihiko SHIMOTOSO
Keyword(s):  
Wear Behavior ◽  
Alumina Ceramics ◽  
Joint Prostheses

scholarly journals Wear behavior of oxidized Ti-48Al-2Cr-2Nb (at. %), Ti-6Al-4V and Cp-Ti under dry and lubricated conditions

2015 ◽  
Vol 2 (1) ◽  
pp. 39
Author(s):  
Carlos R. Ramos-Saenz ◽  
Paul A. Sundaram
Keyword(s):  
Titanium Aluminide ◽  
Biomedical Applications ◽  
Tial Alloy ◽  
Wear Behavior ◽  
Gamma Titanium Aluminide ◽  
Oxidation In Air ◽  
Joint Prostheses ◽  
Cp Ti ◽  
Tribomechanical Properties ◽  
Wear Tests

Gamma titanium aluminide (gamma-TiAl) is a titanium alloy which contains no vanadium and appears to have potential for biomedical applications such as joint prostheses. The tribomechanical properties of Ti-48Al-2Cr-2Nb (at. %) (gamma-TiAl) subjected to oxidation in air at 500°C and 800°C were determined by standard wear tests using a hardened stainless steel (SS) pin in a linearly reciprocating mode under both dry and lubricated (Ringer’s solution) media. Similar properties for CP-Ti and Ti-6Al-4V were measured for comparison.  The lowest mean mass loss was obtained for oxidized gamma-TiAl alloy indicating excellent wear resistance. The dominant wear mechanism on all the Ti alloy samples was abrasion.  The oxidation temperature had a minimal effect on the wear of gamma-TiAl but was significant for the other two alloys.

scholarly journals The Effect of Perlite Addition on Erosive Wear Behavior of Alumina Ceramics

2014 ◽  
Vol 125 (2) ◽  
pp. 632-634
Author(s):  
S. Tas ◽  
E. Ercenk ◽  
S. Yilmaz
Keyword(s):  
Wear Behavior ◽  
Erosive Wear ◽  
Alumina Ceramics

The Influence of Nitrogen Implantation on the Hydrogen Distribution in Titanium Observed by Nra and Xps

1998 ◽  
Vol 513 ◽  
Author(s):  
M. Soltani-Farshi ◽  
H. Baumanna ◽  
B. Baretzky ◽  
D. Rück ◽  
K. Bethgea
Keyword(s):  
Photoelectron Spectroscopy ◽  
Wear Behavior ◽  
High Vacuum ◽  
Pure Titanium ◽  
Nuclear Reaction Analysis ◽  
Nitrogen Implantation ◽  
Hydrogen Distribution ◽  
Near Surface ◽  
Depth Profiles ◽  
Joint Prostheses

ABSTRACTTitanium has a strong chemical affinity and can absorb and store large amounts of hydrogen, which causes embrittlement of the material. Ion implantation is applied to improve wear behavior e.g. of titanium alloys, which are used for load bearing components of hip and knee joint prostheses. Nitrogen implantation influences the hydrogen content in the near surface region of a commercially available pure titanium. 150 keV 15N-ions were implanted at RT into titanium samples with a fluence of 6 × 1017 ions/cm2 and subsequently annealed at 500°C under high vacuum conditions. For comparison N was also implanted at a sample temperature of 500°C. Concentration depth profiles of implanted nitrogen and accumulated hydrogen were measured with Nuclear Reaction Analysis (NRA) and compared to nitrogen and titanium depth profiles obtained with X-ray Photoelectron Spectroscopy (XPS). The results indicate a relation between hydrogen concentration and the formation of Ti-N bonds.

Influence of the Cup's Edge Geometry on the Transferred Stresses to the Ball/Cup Interface in all Ceramic THR

2006 ◽  
Vol 510-511 ◽  
pp. 778-781
Author(s):  
Daniel G. Carrillo ◽  
Soo Wohn Lee ◽  
Joaquín Lira-Olivares
Keyword(s):  
Hip Replacement ◽  
Wear Behavior ◽  
Element Model ◽  
Geometrical Parameters ◽  
Alumina Ceramics ◽  
Stress Concentrations ◽  
Zirconia Ceramics ◽  
All Ceramic ◽  
Stress Patterns ◽  
Symmetric Finite Element

Alumina ceramics as well as zirconia ceramics have been used to manufacture hip replacement components since the 1990’s. These materials have been used for the ceramic balls and cups in the replacements for the following reasons: in the case of alumina for its excellent wear behavior; and in the case of zirconia, for its good wear behavior but with greater fracture toughness than alumina. Nevertheless, since ceramics are brittle, the design of the components must consider ways to avoid detrimental stress concentrations. In this study the stress concentration on the rim of the ceramic cup is inspected by means of a two-dimensional axis symmetric finite element model. This model simulates contact between the components to obtain the stresses that are transferred from the ball to the cup. Different geometries of the cup’s edge are simulated to evaluate the incidence of the geometry over the stress pattern. Although this model concentrates on the contact between the ball and the cup, the loading is made from the stem to the ball, which means that the load is transferred from the stem to the ball and then to the cup. This approach may offer a more realistic output. The data from this study may be useful for hip replacement designers as well as for surgeons because it shows a direct relationship between the stress patterns and the geometrical parameters of the design.

Solid Particle Erosion-Wear Behavior of Alumina Ceramics at High-Temperature

2010 ◽  
Vol 177 ◽  
pp. 129-131 ◽  
Author(s):  
Xiao Jun Wang ◽  
Ming Hao Fang ◽  
Hao Ran Sun ◽  
Shao Ping Huang ◽  
Yan Gai Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Wear Rate ◽  
Solid Particle ◽  
Wear Behavior ◽  
Wear Particle ◽  
Solid Particle Erosion ◽  
Erosion Wear ◽  
Alumina Ceramics ◽  
Particle Erosion ◽  
Air Atmosphere

In this paper, effects of temperature and erosion-wear particle on solid particle erosion-wear behavior of alumina ceramics were studied. The erosion-wear experiments were performed using self-designed sand blasting high-temperature solid particle erosion-wear equipment in air atmosphere. The results show that alumina ceramics presented the characteristics of brittle fracture at the high temperature of 1200°C. Erosion-wear rate increased with increasing temperature and rise obviously above 1000°C. For the same kind of erosion-wear particles, the erosion-wear rate of samples increased with the larger particle size. For the different ones, the greater hardness, the more serious erosion-wear.

scholarly journals Crack growth resistance of alumina, zirconia and zirconia toughened alumina ceramics for joint prostheses

Biomaterials ◽  
2002 ◽  
Vol 23 (3) ◽  
pp. 937-945 ◽  
Author(s):  
A.H. De Aza ◽  
J. Chevalier ◽  
G. Fantozzi ◽  
M. Schehl ◽  
R. Torrecillas
Keyword(s):  
Crack Growth ◽  
Crack Growth Resistance ◽  
Alumina Ceramics ◽  
Joint Prostheses ◽  
Zirconia Toughened Alumina

Crack Growth Resistance of Zirconia Toughened Alumina Ceramics for Joint Prostheses

2001 ◽  
Vol 206-213 ◽  
pp. 1535-1538 ◽  
Author(s):  
Antonio H. De Aza ◽  
Jérôme Chevalier ◽  
Gilbert Fantozzi ◽  
Martin Schehl ◽  
Ramon Torrecillas
Keyword(s):  
Crack Growth ◽  
Crack Growth Resistance ◽  
Alumina Ceramics ◽  
Joint Prostheses ◽  
Zirconia Toughened Alumina

Vanadium Additions to a High-Cr White Iron and its Effects on the Abrasive Wear Behavior.

MRS Advances ◽  
2020 ◽  
Vol 5 (59-60) ◽  
pp. 3077-3089
Author(s):  
Alexeis Sánchez ◽  
Arnoldo Bedolla-Jacuinde ◽  
Francisco V. Guerra ◽  
I. Mejía
Keyword(s):  
Heat Treatment ◽  
Abrasive Wear ◽  
Volume Fraction ◽  
Wear Behavior ◽  
Wear Behaviour ◽  
White Iron ◽  
Heat Treated ◽  
Bulk Hardness ◽  
Abrasive Wear Behavior ◽  
Vanadium Carbides

AbstractFrom the present study, vanadium additions up to 6.4% were added to a 14%Cr-3%C white iron, and the effect on the microstructure, hardness and abrasive wear were analysed. The experimental irons were melted in an open induction furnace and cast into sand moulds to obtain bars of 18, 25, and 37 mm thickness. The alloys were characterized by optical and electronic microscopy, and X-ray diffraction. Bulk hardness was measured in the as-cast conditions and after a destabilization heat treatment at 900°C for 45 min. Abrasive wear resistance tests were undertaken for the different irons according to the ASTM G65 standard in both as-cast and heat-treated conditions under a load of 60 N for 1500 m. The results show that, vanadium additions caused a decrease in the carbon content in the alloy and that some carbon is also consumed by forming primary vanadium carbides; thus, decreasing the eutectic M7C3 carbide volume fraction (CVF) from 30% for the base iron to 20% for the iron with 6.4%V;but overall CVF content (M7C3 + VC) is constant at 30%. Wear behaviour was better for the heat-treated alloys and mainly for the 6.4%V iron. Such a behaviour is discussed in terms of the CVF, the amount of vanadium carbides, the amount of martensite/austenite in matrix and the amount of secondary carbides precipitated during the destabilization heat treatment.

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