Characterization, quantification, and isolation of aluminum oxide particles on grit blasted titanium aluminum alloy hip implants

2007 ◽  
Vol 83B (1) ◽  
pp. 127-131 ◽  
Author(s):  
Alexander Grübl ◽  
Alexander Kolb ◽  
Georg Reinisch ◽  
Günter Fafilek ◽  
Gobert Skrbensky ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Aluminum Oxide ◽  
Hip Implants ◽  
Titanium Aluminum ◽  
Oxide Particles

scholarly journals Development of PE/PCL Bilayer Films Modified with Casein and Aluminum Oxide

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3090
Author(s):  
Anita Ptiček Siročić ◽  
Ana Rešček ◽  
Zvonimir Katančić ◽  
Zlata Hrnjak-Murgić
Keyword(s):  
Mechanical Properties ◽  
Thermal Properties ◽  
Water Vapor ◽  
Aluminum Oxide ◽  
Water Vapor Permeability ◽  
Vapor Permeability ◽  
Mechanical And Thermal Properties ◽  
Oxide Compound ◽  
Bilayer Films ◽  
Oxide Particles

The studied samples were prepared from polyethylene (PE) polymer which was coated with modified polycaprolactone (PCL) film in order to obtain bilayer films. Thin PCL film was modified with casein/aluminum oxide compound to enhance vapor permeability as well as mechanical and thermal properties of PE/PCL films. Casein/aluminum oxide modifiers were used in order to achieve some functional properties of polymer film that can be used in various applications, e.g., reduction of water vapor permeability (WVTR) and good mechanical and thermal properties. Significant improvement was observed in mechanical properties, especially in tensile strength as well as in water vapor values. Samples prepared with aluminum oxide particles indicated significantly lower values up to 60%, and samples that were prepared with casein and 5% Al2O3 showed the lowest WVTR value.

INFLUENCE OF MORPHOLOGY, PHASE COMPOSITION AND CONTENT OF ALUMINUM OXIDE PARTICLES ON RHEOLOGICAL PROPERTIES OF AQUEOUS SUSPENSIONS BASED ON THEM

2021 ◽  
pp. 14-25
Author(s):  
V.A. Voronov ◽  
◽  
A.S. Chainikova ◽  
Yu.E. Lebedeva ◽  
D.M. Tkalenko ◽  
...  
Keyword(s):  
Phase Composition ◽  
Aluminum Oxide ◽  
Aggregate Stability ◽  
Plasma Chemical ◽  
Buffer Solution ◽  
Sedimentation Stability ◽  
Aqueous Suspensions ◽  
Oxide Powders ◽  
Ceramic Samples ◽  
Oxide Particles

This work investigated the chemical and phase composition of aluminum oxide powders obtained by various methods (alkoxide, codeposition, thermal and plasma-chemical). The physicomechanical, thermophysical and thermal properties of ceramic samples based on them have been determined. The effect of the nature of the aluminum oxide powder and the production process parameters on the sedimentation stability of aqueous suspensions based on them has been determined. The influence of the content of particles of aluminum oxide, buffer solution and rheological additives on the viscosity, sedimentation and aggregate stability of aqueous suspensions has been determined.

scholarly journals Evaluation of ceramic flexural strength of a cobalt-chromium alloy subjected to airborne particle abrasion and tungsten inert gas welding

2019 ◽  
Vol 18 ◽  
pp. e191443
Author(s):  
Laise Pena Braga Monteiro ◽  
Issae Sousa Sano ◽  
Suelen Reis Cunha ◽  
Eliza Burlamaqui Klautau ◽  
Bruno Pereira Alves
Keyword(s):  
Flexural Strength ◽  
Aluminum Oxide ◽  
Tig Welding ◽  
Inert Gas ◽  
Bending Test ◽  
Chromium Alloy ◽  
Cobalt Chromium ◽  
Airborne Particle ◽  
Ceramic Bond ◽  
Oxide Particles

Aim: The aim of this study was to evaluate the influence of tungsten inert gas (TIG) welding and airborne particle abrasion using aluminum oxide particles on the flexural strength of a joint between ceramic and cobalt-chromium alloys. Methods: The specimens were cast and welded using TIG, then divided into 6 groups (n = 10) and subjected to blasting with 250 μm, 100 μm, and 50 μm aluminum oxide particles. Ceramic systems were applied to the central part of all specimens. A three-point bending test using a velocity of 0.5 mm/m was performed on the specimens to measure flexural strength. Data were analyzed using two-way analysis of variance and Tukey’s test. Results: TIG welding demonstrated the lowest resistance compared with the non-welded groups. Airborne particle abrasion using 250 μm aluminum oxide particles demonstrated greater resistance in the welded groups (p < 0.05). Mixed faults were found in all specimens. Conclusion: TIG welding decreased the bond strength, and the particle size of aluminum oxide did not affect the metal-ceramic bond in groups without TIG welding.

scholarly journals SIMULATION OF THE BEHAVIOR OF TITANIUM-ALUMINUM COMPOSITE WITH WAVE PROFILE OF WELDED JOINT

2021 ◽  
pp. 37-42
Author(s):  
L. M. Gurevich ◽  
V. F. Danenko ◽  
V. Abo-Shakra
Keyword(s):  
Finite Element ◽  
Aluminum Alloy ◽  
Welded Joint ◽  
Tensile Deformation ◽  
Wave Profile ◽  
Relative Thickness ◽  
Aluminum Composite ◽  
Active Deformation ◽  
Element Simulation ◽  
Titanium Aluminum

The finite element simulation of tensile deformation of titanium-aluminum composite D20 - AD1 - VT6S was carried out. The composite had a wave profile of the welded joint at the boundaries D20 - AD1 and AD1 -VT6S. The thickness of the AD1 interlayer was varied in the simulation from 0.25 to 4 mm. The relative thickness of the interlayer corresponding to the onset of active deformation of the aluminum alloy has been determined.

Comparative Study of Surface Contaminated Layer on Titanium Aluminum Alloy and Titanium Alloy Investment Castings

2021 ◽  
Vol 1035 ◽  
pp. 602-607
Author(s):  
Zhi Hua Feng ◽  
Xian Fei Ding ◽  
Xin Feng ◽  
Hai Nan ◽  
Ai Bin Zhang
Keyword(s):  
Titanium Alloy ◽  
Aluminum Alloy ◽  
Comparative Study ◽  
Chemical Reaction ◽  
Microhardness Measurement ◽  
Ceramic Mold ◽  
Al Alloy ◽  
Ti Alloy ◽  
Titanium Aluminum ◽  
Alloy Castings

A comparative study of the surface contaminated layer formed by chemical reaction between ceramic-mold and titanium aluminum alloy castings or titanium alloy castings were carried out. The morphology, thickness and hardness of the surface contaminated layer were characterized by means of metalloscopy and microhardness measurement. The results show that surface contaminated layers formed between Ti-Al alloy castings and ceramic-mold, also formed between Ti alloy castings and ceramic-mold. The surface contaminated layers of Ti-Al alloy castings were continuous and compact, their thickness was about 0~90 μm. The surface contaminated layers of titanium alloy castings were not even, their thickness was 0~900 μm. Titanium alloy is more liable to react with the ceramic -mold than the Ti-Al alloy.

Homogenization and Extrudability of 5056 Aluminum Alloy Billet

2019 ◽  
Vol 801 ◽  
pp. 233-238
Author(s):  
Cheng Hsin Hsiao ◽  
Sen Tian Kao ◽  
Wen Jauh Chen
Keyword(s):  
Aluminum Alloy ◽  
Magnesium Oxide ◽  
Seamless Tube ◽  
Theoretical Level ◽  
Quality Problem ◽  
Billet Surface ◽  
Oxide Particles ◽  
Segregation Zone

Through a series of homogenization and extrusion experiments, the extrusion efficacy of 5056 seamless tubes is improved. Although better extrusion practice was apparent with better homogenization parameters for 5056 alloy, a little over-burning structure and phenomena were found on and in the surface and segregation zone of homogenized billet. The extrudability is worse than theoretical level with no aluminum and magnesium oxide particles on the billet surface. Additional, another quality problem in this study is the segregation zone in 5056 larger billets. The over-heat structure was smoothly flowed into the seamless tube by indirect extrusion, and that makes surface bubbles.

Titanium Aluminum Alloy Fabricated by Pressure Infiltration and Heat Treatment

PRICM ◽  
2013 ◽  
pp. 493-499
Author(s):  
Aibin Li ◽  
Lin Geng ◽  
Feng Li ◽  
Rui Chen
Keyword(s):  
Heat Treatment ◽  
Aluminum Alloy ◽  
Pressure Infiltration ◽  
Titanium Aluminum

STATIC VOLUME–PRESSURE RELATIONS IN GUINEA PIG LUNGS AFTER INHALATION OF ALUMINUM OR IRON OXIDE PARTICLES AND BRONCHODILATOR AEROSOLS

1963 ◽  
Vol 41 (2) ◽  
pp. 461-468 ◽  
Author(s):  
E. Robillard ◽  
Y. Alarie
Keyword(s):  
Iron Oxide ◽  
Guinea Pig ◽  
Aluminum Oxide ◽  
Previous Exposure ◽  
Iron Oxide Particles ◽  
Antagonistic Action ◽  
Low Concentration ◽  
Oxide Particles ◽  
The Right ◽  
Volume Pressure Curves

Volume–pressure curves obtained from isolated atelectatic guinea pig lungs under normal controlled conditions are compared with those obtained from animals having inhaled fine aluminum or iron oxide particles. After particles inhalation, the inflation curves are deviated to the right, showing a constricting effect. Previous exposure to low concentration of isoproterenol aerosol fails to reverse completely the constricting effect induced by a prior inhalation of aluminum oxide particles although in combination with diphenhydramine or at a higher concentration an antagonistic action appears. Cyproheptadine aerosolation also prevents the constricting effect of inhaled aluminum oxide particles The constricting effect of iron oxide was not prevented by those dilating aerosols at concentrations used.

Mechanical properties of aged yttria-stabilized tetragonal zirconia polycrystal after abrasion with different aluminum oxide particles

2020 ◽  
Vol 124 (5) ◽  
pp. 599-604
Author(s):  
Suelem C. Barreto ◽  
Renally B.W. Lima ◽  
Flávio Henrique B. Aguiar ◽  
Carlos Tadeu D. Santos ◽  
Luís Alexandre M.S. Paulillo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Oxide ◽  
Tetragonal Zirconia ◽  
Oxide Particles ◽  
Tetragonal Zirconia Polycrystal
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