Effects of Heat Treatment on Corrosion and Wear Behaviors of Mg-6Gd-2Zn-0.4Zr Alloy in Simulated Body Fluid

2017 ◽  
Vol 26 (11) ◽  
pp. 5501-5510 ◽  
Author(s):  
Li Zhao ◽  
Wei Chen ◽  
Jianwei Dai ◽  
Zhangzhong Wang ◽  
Xiaobo Zhang
Keyword(s):  
Heat Treatment ◽  
Simulated Body Fluid ◽  
Body Fluid ◽  
Corrosion And Wear

Improvement of Apatite-Forming Ability of Tantalum Metal by CaCl2 Treatment

2007 ◽  
Vol 361-363 ◽  
pp. 681-684
Author(s):  
Deepak K. Pattanayak ◽  
Tomiharu Matsushita ◽  
Hiroaki Takadama ◽  
Tadashi Kokubo ◽  
Takashi Nakamura
Keyword(s):  
Heat Treatment ◽  
Simulated Body Fluid ◽  
Body Fluid ◽  
Edx Analysis ◽  
Na Ions ◽  
Naoh Treatment ◽  
Tantalum Metal ◽  
Cacl2 Treatment ◽  
Xrd Patterns

Tantalum metal was soaked in NaOH and CaCl2 solutions, and then subjected to heat treatment at 500°C. EDX analysis showed that about 6.5 at. % of Na was incorporated into the surface of the tantalum metal by the first NaOH treatment. These Na+ ions were replaced by Ca2+ ions by the subsequent CaCl2 treatment. According to TF-XRD patterns, an amorphous sodium tantalate was seemed to be formed on the tantalum metal by the NaOH treatment and transformed into amorphous calcium tantalate by the CaCl2 treatment. This phase was crystallized into Ca2Ta2O7 by heat treatment. Critical detaching load of the surface of the CaCl2-treated tantalum metal was as low as 5mN, while as high as 42mN after the heat treatment. Apatite-forming ability of the NaOH-treated tantalum metal in a simulated body fluid (SBF) was appreciably increased by the CaCl2 treatment and maintained even after the heat treatment.

Effect of Annealing on Microstructure of Hydroxyapatite Coatings and their Behaviours in Simulated Body Fluid

2014 ◽  
Vol 922 ◽  
pp. 657-662 ◽  
Author(s):  
Sharidah Azuar Abdul Azis ◽  
John Kennedy ◽  
Peng Cao
Keyword(s):  
Heat Treatment ◽  
Simulated Body Fluid ◽  
Body Fluid ◽  
Ion Beam ◽  
Apatite Formation ◽  
Ion Beam Sputtering ◽  
Different Temperatures ◽  
Higher Temperature ◽  
Xrd Patterns ◽  
Post Deposition

In this study, hydroxyapatite (HA) coatings on Ti6Al4V substrate were deposited using an ion beam sputtering technique. Owing to its medical applications, the crystalline phases present in the HA must be controlled. This study investigated the effect of post-deposition heat treatment at different temperatures and evaluated the microstructure of the HA coatings and their behaviours in simulated body fluid (SBF). The post-deposition treatment of the as-deposited samples was carried out in an air-circulated furnace at a temperature between 3000C and 6000C. The XRD patterns reveal that the minimum temperature to transform the HA coating from amorphous to crystalline phase is 4000C. A higher temperature at 6000C leads to a growth of the crystalline HA phases. Fourier transform infrared spectroscopy (FTIR) measurements show the existence of hydroxyl and PO-bonds in all coatings and the amounts varied with temperature. Atomic Force Microscopy (AFM) study suggests that the nanostructured crystalline HA starts to grow at 4000C and becomes more obvious at a higher temperature of 6000C. The simulated body fluid (SBF) test reveals that better apatite formation with post deposition heat treatment at 6000C would potentially enhance the formation of new bone (osseointegration).

Heat Treatment Effect on Biological Behavior of Polyetheretherketone Composites

2022 ◽  
Vol 54 ◽  
pp. 119-128
Author(s):  
Alaa A. Mohammed ◽  
Jawad K. Oleiwi
Keyword(s):  
Heat Treatment ◽  
Simulated Body Fluid ◽  
Mtt Assay ◽  
Body Fluid ◽  
Antibacterial Properties ◽  
Biological Behavior ◽  
Apatite Formation ◽  
Crystalline Polymers ◽  
Density Methods

Polyetheretherketone is a semi-crystalline thermoplastic polymer, that so with heat treatments, it is possible to get different properties which are very important for the material performance. Heat treatment is a broadly utilized to develop the semi-crystalline polymers properties. In the present investigation, annealing of polyetheretherketone (PEEK) was carried out at temperatures above its glass transition temperature (Tg) to study its effects upon the biological conduct of the control and PEEK ternary composites. The bioactivity of the specimens was evaluated by investigating the apatite formation after immersion for different periods in a simulated body fluid (SBF). The biocompatibility of specimens was assessed by MTT assay. Additionally, the antibacterial property of the specimens versus S. aureus was observed with the optical density methods. The results manifested that the formation of hydroxyapatite was obviously observed on specimens after immersion for (7 and 14 days) in the simulated body fluid (SBF). Otherwise, the results of MTT assay recorded the PEEK specimens that excited the activity of fibroblasts, and therefore a high cytocompatibility was noticed and the specimens revealed antibacterial properties against S. aureus. So, the results of the bioactivity, biocompatibility and antibacterial tests in vitro demonstrated that the heat treatment enhanced biological behavior.

Effects of Heat Treatment on Apatite Formation of CaO-SiO2-PEEK Composites

2012 ◽  
Vol 529-530 ◽  
pp. 436-440 ◽  
Author(s):  
S.B. Cho ◽  
E.M. An ◽  
Sujeong Lee ◽  
H.D. Jang ◽  
Ill Yong Kim ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Simulated Body Fluid ◽  
Body Fluid ◽  
Sol Gel ◽  
Spherical Particles ◽  
Organic Polymer ◽  
Apatite Formation ◽  
Ceramic Filler ◽  
Induction Periods ◽  
Sol Gel Process

Osteoconductive bone-repairing materials with mechanical properties analogous to those of human bone can be prepared through the combination of an osteoconductive ceramic filler with an organic polymer. Osteoconduction is archived from apatite formation on substrates. Previously, we reported that novel osteoconductive spherical particles in a binary CaO-SiO2 system were produced through a sol-gel process as ceramic filler for the fabrication of composites. In this study, we fabricated the composites consisting of polyetheretherketone (PEEK) and 30CaO·70SiO2 (CS) spherical particles and evaluated the effects of heat treatment in the range of 320-360 °C on apatite formation of the composites in a simulated body fluid. The prepared composites of PEEK and CS particles form hydroxyapatite on their surfaces in the simulated body fluid. The induction periods of hydroxyapatite on the composites decreased with increasing the amount of CS particles and decreasing the temperature for heat treatment. The apatite formation was affected by exposure of ceramic filler on the polymer matrix.

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