Investigation on Biocompatibility and Mechanical Properties of Ti15Mg Alloy

2021 ◽  
Vol 1039 ◽  
pp. 557-564
Author(s):  
Haydar Abdul Hassan Al-Ethari ◽  
Sundus Abbas Jasim ◽  
Ekhlas Khalid Zamel
Keyword(s):  
Mechanical Properties ◽  
Wear Behavior ◽  
Research Work ◽  
Wear Test ◽  
Optical Microscope ◽  
Alloy Sample ◽  
Microscope Analysis ◽  
Good Biocompatibility ◽  
Prepared Alloy

In this research work, bioactive Ti15Mg alloy was prepared by powder metallurgy route to investigate its biocompatibility and mechanical properties. Many tests were performed including X-ray diffraction; optical microscope analysis, scanning electron microscope analysis, ultrasonic wave test, corrosion behavior test, Static immersion test, and the wet sliding wear test. The XRD result shows that the prepared alloy sample consist of (α-Ti phase) and Mg. The microstructure of the prepared alloy sample consisted of a biodegradable Mg or pore and alpha titanium. The effect of the Mg content on degradability was tested based on simulated body fluid of Ringer solutions using electrochemical corrosion. The findings indicate that an elastic modulus of 47GPa exhibits the alloy. There were low corrosion rates of the alloy. The Ti matrix remained integrity after 14 days of immersion in the Ringer solutions, and the magnesium phase dissolved in the solution, causing a layer to form on the alloy. The wear behavior of the prepared ally at wet sliding conditions was evaluated using pin on disc method. The in vitro analysis showed good biocompatibility with Ti15Mg alloy. The prepared alloy demonstrates good biocompatibility and bioactivity.

scholarly journals Study on Properties of Multi Walled Carbon Nanotube Reinforced Aluminum Matrix Composite through Casting Technique

2021 ◽  
Vol 18 (1) ◽  
pp. 97-101
Author(s):  
Shuib Pasha S A ◽  
Nayeem Ahmed M ◽  
Tilak S R ◽  
Anil Kumar B N
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Matrix Composite ◽  
Research Work ◽  
Aluminum Matrix ◽  
Stir Casting ◽  
Optical Microscope ◽  
Aluminum Matrix Composite ◽  
Casting Technique ◽  
Multi Walled Carbon Nanotubes

Composite materials are defined as material systems consisting of mixture of or combination of two or more micro constituents insoluble in each other and differing in form and or material composition. In this study Metal Matrix Composite (MMCs) has been produced using stir casting method for performing the mechanical properties. Most of the engineering industries want light and better mechanical properties of components; this can be achieved by MMCs of Aluminium because of its excellent performance. In this research work we fabricate the Aluminium by liquid route. Here Al 7075 is used as a base metal and Multi Walled Carbon Nanotubes (MWCNT) used as sub metal with various percentages. Experiments were conducted to analyze microstructure, hardness & tensile strength. By using optical microscope and Scanning Electron Microscope (SEM) we analyze the sample specimens are well dispersion in MWCNT with AA 7075. Hardness and tensile strength increases with increasing of wt. %. Hardness of material increases with increase in percentages of MWCNT, whereas tensile strength of the material increases with increase in percentages of MWCNT and Elongation reduces

scholarly journals Effect of Nano Structured NiFe and NiP Thin Layer Coatings on Structural and Mechanical Properties of Mild Steel

2019 ◽  
Vol 8 (2S11) ◽  
pp. 2262-2266
Keyword(s):  
Mechanical Properties ◽  
Surface Roughness ◽  
Mild Steel ◽  
Wear Behavior ◽  
Diffraction Method ◽  
Wear Test ◽  
Thin Layers ◽  
Constant Current ◽  
Constant Current Density ◽  
Pin On Disc

The nano crystalline thin coating of NiFe and NiP C has been successfully carried out by using electroplating technique in order to enhance the structural and mechanical properties of mild steel. The NiFe & NiP thin layers were coated on mild steel at constant current density and pH over a deposition period of 30 minutes. All the coated mild steel samples were subjected to various characterization techniques like X-ray Diffraction method (XRD), Vickers hardness, surface roughness and wear test to reveal the effect of NiFe and NiP on mild steel. The mechanical properties such as surface roughness and wear behavior were investigated by using Stylus profilometer and Pin on disc method. The coated mild steel exhibits enhanced mechanical properties than that of uncoated mild steel. The variations in structural and mechanical properties of coated mild steel were also studied.

scholarly journals Enhancement the Osseo Integration Properties of Polymer for Human Body Implants

2020 ◽  
Vol 23 (4) ◽  
pp. 331-337
Author(s):  
Dhurgham Majid Rasheed ◽  
Dunya Abdulsahib Hamdi
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Grain Boundaries ◽  
Mechanical Performance ◽  
Wear Test ◽  
High Energy ◽  
In Vitro Test ◽  
Scanning Electron

In this research, polymer polymethyl methacrylate PMMA composite with nano ceramic Zr and HAp material were used to manufacture one part of the implant system (femoral ball head of hip implant). Three set of hybrid materials were fabricated and tested for this study; the first mixtures which contains 100% (PMMA), the second mixtures which contains (90% (PMMA) + 8% (Zr) + 2% (HAp)), and the third mixtures which contains (80% (PMMA) + 18% (Zr) + 2% (HAp)) were investigated. The mechanical properties for these mixtures increased with the increasing of nano ceramic concentration (Zr and HAp) composite material in the polymer compared to pure polymer PMMA sample. However, an increase in the concentration of Zr from 8% to 18% content cause a considerable decrease of the hardness where a drop of homogeneity in Zr- matrix PMMA contact occurred, V Hardness value are (68 ,80 and 70) Kg.mm for three mixture respectively. The wear test was in agreement with results of the hardness test. The weight loss of the above samples of the wear test were (0.041, 0.035 and 0.037) respectively. According to mechanical properties, the best sample contains (90% (PMMA) + 8% (Zr) + 2% (HAp)). The Scanning electron microscopy resolute showed the particles forming semi-continuous network along grain boundaries polymer for second sample mixtures containing (90% (PMMA) + 8% (Zr) + 2% (HAp)), provides a low atomic packing and high energy. This will make the grain boundaries more reactive and strengthen mechanical performance. The Optical microscopy, Scanning electron microscopy and Xray spectroscopy analysis for In vitro test using SBF shows the growth of HAp layer with an increase in concentration of Ca and P elements formed on the surface of the second sample. This display of good results is a proof of the biocompatibility of the polymer sample.

Porous polymeric scaffolds for bone regeneration

e-Polymers ◽  
2005 ◽  
Vol 5 (1) ◽  
Author(s):  
Katarzyna Filipczak ◽  
Ireneusz Janik ◽  
Marek Kozicki ◽  
Piotr Ulanski ◽  
Janusz M. Rosiak ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Total Porosity ◽  
Polymer Chains ◽  
Porous Scaffolds ◽  
Solvent Casting ◽  
Polymeric Scaffolds ◽  
Good Biocompatibility ◽  
Particulate Leaching ◽  
Highly Porous

AbstractSolvent casting/particulate leaching has been used to synthesize highly porous polymeric scaffolds of controlled pore size, based on poly(methyl methacrylate) (PMMA) and poly(ε-caprolactone) (PCL). Obtained structures have a total porosity of c. 60%, with good interconnections between the pores. Porous scaffolds prepared using the greatest size of NaCl particles have the best mechanical properties. Both PMMA- and PCL-based materials can be sterilized by ionizing radiation. In the case of PCL-based scaffolds, irradiation causes cross-linking of polymer chains, which leads to an improvement of the mechanical properties of the scaffold. The compressive elastic modulus for non-porous samples increases with irradiation dose from 1.5 MPa for 0 kGy to 1.9 MPa for 280 kGy. Preliminary in vitro studies indicate good biocompatibility of both materials.

Role of Zirconia Filler on Mechanical Properties and Dry Sliding Wear Behavior of Glass/Basalt Hybrid Fabric Reinforced Epoxy Composites

2019 ◽  
Vol 895 ◽  
pp. 200-205
Author(s):  
B.S. Kanthraju ◽  
Bheemappa Suresha ◽  
H.M. Somashekar
Keyword(s):  
Mechanical Properties ◽  
Wear Rate ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Mechanical Test ◽  
Basalt Fiber ◽  
Wear Test ◽  
Specific Wear Rate ◽  
Dry Sliding Wear ◽  
Dry Sliding

This paper presents the effect of zirconia filler on mechanical properties and dry sliding wear of bidirectional hybrid (glass and basalt fiber) fabric reinforced epoxy (G-B/E) composites. Fabrication was done by hand layup method followed by compression molding. The effect of zirconia filler loading on mechanical characteristics like hardness, tensile and flexure of fabricated G-B/E composites were determined according to ASTM standards. Also, wear behavior under dry sliding condition was performed using pin-on-disc machine for different applied normal loads/sliding distance. Experimental results reveal that incorporation of zirconia filler improves the mechanical properties. Further, the wear test results indicated addition of zirconia into G-B/E hybrid fiber composites plays important role on specific wear rate under the tribo-conditions selected for the study. Further, inclusion of zirconia into G-B/E composites shows improved wear resistance and addition of 6 wt. % of zirconia exhibits least specific wear rate compared to other hybrid G-B/E composites. In addition, Scanning electron microscope images of selected mechanical test fractured coupons also have been discussed.

scholarly journals Knee Wear Assessment: 3D Scanners Used as a Consolidated Procedure

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2349 ◽  
Author(s):  
Saverio Affatato ◽  
Maria Cristina Valigi ◽  
Silvia Logozzo
Keyword(s):  
Clinical Performance ◽  
Wear Behavior ◽  
Wear Test ◽  
Mobile Bearing ◽  
Clinical Problem ◽  
Material Loss ◽  
Optical Scanners ◽  
Wear Rates ◽  
3D Scanners

It is well known that wear occurring in polyethylene menisci is a significant clinical problem. At this regard, wear tests on biomaterials medical devices are performed in order to assess their pre-clinical performance in terms of wear, durability, resistance to fatigue, etc. The objective of this study was to assess the wear of mobile total knee polyethylene inserts after an in vitro wear test. In particular, the wear behavior of mobile bearing polyethylene knee configurations was investigated using a knee joint wear simulator. After the completion of the wear test, the polyethylene mobile menisci were analyzed through a consolidated procedure by using 3D optical scanners, in order to evaluate the 3D wear distribution on the prosthesis surface, wear depths, wear rates, amount of material loss and contact areas. The results in terms of wear rates and wear volumes were compared with results of gravimetric tests, finding equivalent achievements.

Studying the Effect of Different Combinations of Salt Modifier on the Mechanical Properties and Microstructure of A356 Al-Si Alloy

2013 ◽  
Vol 344 ◽  
pp. 27-36
Author(s):  
Rafiq Ahmad ◽  
Saima Mumtaz ◽  
Tahir Ahmad
Keyword(s):  
Mechanical Properties ◽  
Testing Machine ◽  
Optical Microscope ◽  
Tensile Testing Machine ◽  
Purity Aluminium ◽  
High Purity Aluminium ◽  
Casting Sand ◽  
Metallurgical Evaluation ◽  
Mould Casting ◽  
Prepared Alloy

The present study aims to develop A356 Al-Si alloy using high purity aluminium and various master alloy in gas fired pit furnace. Three different ratio of salt modifier (1:1, 1:2 & 1:3) was used to prepare the casting. Sand casting and permanent mould casting techniques were used to prepare the alloys. Optical microscope and universal tensile testing machine were used for the metallurgical evaluation of the prepared alloy. It was observed that the addition of modifier improved the mechanical properties and microstructure of the alloy. It was also observed that modifying agent NaF with CaCl2in 1:1 ratio has shown the best results in terms of microstructure and the mechanical properties.

scholarly journals Extrusion Printed Graphene/Polycaprolactone/Composites for Tissue Engineering

2013 ◽  
Vol 773-774 ◽  
pp. 496-502 ◽  
Author(s):  
Sepidar Sayyar ◽  
Rhys Cornock ◽  
Eoin Murray ◽  
Stephen Beirne ◽  
David L. Officer ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tissue Engineering ◽  
Three Dimensional ◽  
Promising Material ◽  
Additive Fabrication ◽  
Printing System ◽  
Good Biocompatibility ◽  
Covalently Linked ◽  
Extrusion Printing

In this work fibres and complex three-dimensional scaffolds of a covalently linked graphene-polycaprolactone composite were successfully extruded and printed using a melt extrusion printing system. Fibres with varying diameters and morphologies, as well as complex scaffolds were fabricated using an additive fabrication approach and were characterized. It was found that the addition of graphene improves the mechanical properties of the fibres by over 50% and in vitro cytotoxicity tests showed good biocompatibility indicating a promising material for tissue engineering applications.

Wear Behavior of Enamel/Dentine and Veneering Ceramics

2007 ◽  
Vol 330-332 ◽  
pp. 1251-1254
Author(s):  
Q.P. Gao ◽  
Yong Lie Chao ◽  
X.Ch. Jian ◽  
F. Guo ◽  
Y.K. Meng ◽  
...  
Keyword(s):  
Wear Behavior ◽  
Statistical Significance ◽  
Wear Test ◽  
In Vitro Study ◽  
Fatigue Wear ◽  
Human Teeth ◽  
Element Concentrations ◽  
Frictional Coefficients ◽  
Ceramic Restorations

This in vitro study compared the wear behavior between the enamel/dentine, two types of dental veneering ceramics for all-ceramic restorations (Vita-alpha，Vintage -AL ). A variety of factors including hardness, fracture toughness, flexural strength, frictional coefficients, wear scar width, element concentrations were considered. The wear scars of the samples were characterized by dynamic atomic force microscopy (DFM). The element concentrations of the surface before/after the wear test were determined with energy dispersion spectrometry (EDS). In this study Enamel/dentine, Vita-alpha and Vintage-AL have showed good wear resistance. The results also showed that there were statistical significance in samples. The friction coefficient varied from time in each kind of materials. The analytical differences between materials were observed in wear width and properties of materials (p<0.05). The wear ability among four materials ranked from highest to lowest as follows, Vintage-AL, Vita-alpha, enamel and dentine. DFM results demonstrated the wear patterns of natural tooth detected as abrasive and denaturation of dental texture. Wear patterns of tested veneering ceramics consisted mainly of abrasive wear, adhesion and fatigue wear and the different pattern plays different roles in Vita-alpha and Vintage-AL. The EDS results showed the element concentration of Fe was obviously found on the samples. Resistance ability against wear of veneering ceramics is better than that of natural human teeth. And the ability may have some correlation with the ceramics mechanical properties.

scholarly journals Wear Behavior of Ti6Al4V Surfaces Functionalized through Ultrasonic Vibration Turning

2021 ◽  
Author(s):  
R. Bertolini ◽  
A. Ghiotti ◽  
S. Bruschi
Keyword(s):  
Wear Rate ◽  
Titanium Alloys ◽  
Ultrasonic Vibration ◽  
Coefficient Of Friction ◽  
Biomedical Applications ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Research Work ◽  
Wear Tests

AbstractEven if titanium alloys are widely used for biomedical applications, the tendency they show to wear is a matter of concern for their durability. In this research work, Ultrasonic Vibration Turning (UVT) was used to generate texturized surfaces on Ti6Al4V cylinders for improving their wear performances. To prove that, in vitro wear tests were performed, during which the UVT-ed Ti6Al4V cylinders were made to slide against polyethylene disks to replicate a currently used biomedical pair. It was shown that the UVT-ed Ti6Al4V cylinders were characterized by enhanced performances in terms of coefficient of friction and wear rate, which were reduced to 52 and 25%, respectively, compared to polished Ti6Al4V surfaces.

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