Effect of Sintering Temperature on Morphology, Mechanical Properties and Degradation Rate of Magnesium Alloy as Biodegradable Material

2020 ◽  
Vol 17 (2) ◽  
pp. 1534-1538
Author(s):  
Agung Purniawan ◽  
Peter Andreas Timotius ◽  
Hariyati Purwaningsih ◽  
Sigit Tri Wicaksono ◽  
Amaliya Rasyida
Keyword(s):  
Degradation Rate ◽  
Sintering Temperature ◽  
Hardness Test ◽  
Mg Alloy ◽  
Phase Identification ◽  
Biodegradable Material ◽  
Optimum Result ◽  
Rate Test ◽  
Degradation Properties ◽  
High Degradation Rate

Mg-alloy has possibility to be used as biodegradable biomaterial. The main problem in application of this material is high degradation rate. The aim of this research is to study the mechanical, morphology and the degradation properties of Mg-alloy biodegradable by variation of sintering temperature of 500 °C, 550 °C, and 600 °C. Morphology was investigated using SEM-EDX. Phase identification was carried out by XRD and mechanical qualities test was measured by compressive and hardness test. Degradation rate test was assessed by weight loss test. The outcomes show that Mg–Zn– Cu sample with sintering temperature 600 °C is the optimum result. The compressive strength is 175,14 MPa, the hardness value is 410,59 MPa, and degradation rate is 8,57 cm/year.

scholarly journals Degradation behaviour of magnesium alloy and its composite used as a biomaterial

2021 ◽  
Vol 309 ◽  
pp. 01085
Author(s):  
Sandeep Kumar Jhamb ◽  
Ashish Goyal ◽  
Anand Pandey ◽  
Jay Marwaha ◽  
Jay Matai
Keyword(s):  
Metallic Glasses ◽  
Degradation Rate ◽  
Stress Shielding ◽  
The Body ◽  
Shielding Effect ◽  
Biodegradable Material ◽  
Engineering Material ◽  
Degradation Behaviour ◽  
Gradual Loss ◽  
High Degradation Rate

In the last six decades, it has been made a great advancement in the field of engineering material especially in biomaterials, including metal alloys, composites, polymers, ceramics, and metallic glasses. Different form of these biomaterial are used as a engrafts. Unlike conventional materials such as stainless steel, cobalt, or titanium-based alloy resulting in stress shielding effect, some of these materials are designed in such a way to degrade or to be resorbed inside the body rather than removing the implant after its function is served. Here, Magnesium based biomaterials are the most suitable and used as a newly developed biodegradable material. Inherent mechanical properties of magnesium like properties of elastic and modulus rigidity which are very much same as to those of human bone, make it biocompatible. There is limited use of pure Mg due to its corrosive nature, but when formed an alloy or the composite the degradation property can be improved and making them a material of choice for implantation. This paper aim is to review the degradation rate and the methods to control it. Due to high degradation rate of the Mg, as compare to other biomaterials, our final goal is to maintain the balance between the gradual loss of material and mechanical strength during degradation, by providing the strength to the newly forming bone tissue. Mg-based alloy or composite has the potential to be used as a biomaterial without the need for a second surgery, once this goal is achieved.

Influence of Equal Channel Angular Processing and Rotary Swaging on the Mechanical and Degradation Properties of WE43 Mg Alloy

2019 ◽  
Author(s):  
Francesco D’Elia ◽  
Philipp Hiester ◽  
Carlo Zimmermann ◽  
Igor Schestakow ◽  
Jelena Horky ◽  
...  
Keyword(s):  
Mg Alloy ◽  
Rotary Swaging ◽  
Equal Channel Angular Processing ◽  
Degradation Properties

Direct Cladding from Molten Metals of Aluminum and Magnesium Alloys Using a Tandem Horizontal Twin Roll Caster

2015 ◽  
Vol 772 ◽  
pp. 250-256 ◽  
Author(s):  
Hideto Harada ◽  
Shin Ichi Nishida ◽  
Mayumi Suzuki ◽  
Hisaki Watari ◽  
T. Haga
Keyword(s):  
Surface Condition ◽  
Hardness Test ◽  
Al Alloys ◽  
Mg Alloy ◽  
Al Alloy ◽  
Molten Metals ◽  
Electron Probe Micro Analyzer ◽  
Twin Roll Caster ◽  
Aluminum And Magnesium Alloys ◽  
Twin Roll

This paper describes direct cladding of magnesium (Mg) and aluminum (Al) alloys using a tandem horizontal twin roll caster that has three pairs of upper and lower rolls. Manufacturing conditions that are appropriate for fabricating Al/Mg and Al/Mg/Al cladded material were investigated. The surface condition of the cladded cast strip was examined. An electron probe micro analyzer was used to observe the interface between Al alloy and Mg alloy. The thickness of the mixed layer of Al and Mg alloy was 15μm, and how the materials were connected was clarified. Microscopic observation and backscattered electron analysis were used to investigate the cladding mechanisms of the Al and Mg alloy layers. Average hardness was determined using the Vickers hardness test at the Al layer and at the diffused layer between Mg and Al alloys. Cladding of Al/Mg alloy and A/Mg/Al alloy was possible using a tandem twin-roll caster. In addition, Al3Mg2 and Al12Mg17 phase precipitation at the interface of the Al and Mg alloys was confirmed during direct cladding from molten metals.

scholarly journals Decreasing Bio-Degradation Rate of the Hydrothermal-Synthesizing Coated Mg Alloy via Pre-Solid-Solution Treatment

Materials ◽  
2017 ◽  
Vol 10 (8) ◽  
pp. 858 ◽  
Author(s):  
Dan Song ◽  
Cheng Li ◽  
Liwen Zhang ◽  
Xiaolong Ma ◽  
Guanghui Guo ◽  
...  
Keyword(s):  
Solid Solution ◽  
Degradation Rate ◽  
Solution Treatment ◽  
Mg Alloy ◽  
Solid Solution Treatment

Degradation of Phenol by Fe3+ Doped Nano-TiO2 Photocatalyst

2013 ◽  
Vol 859 ◽  
pp. 361-364 ◽  
Author(s):  
Jing Wang ◽  
Du Shu Huang ◽  
Wei Liu ◽  
Qing Shan Pan ◽  
Yong Min
Keyword(s):  
Degradation Rate ◽  
Annealing Temperature ◽  
Sol Gel ◽  
Phenol Degradation ◽  
Nano Tio2 ◽  
Phenol Solution ◽  
Sol Gel Process ◽  
Two Peaks ◽  
Degradation Properties ◽  
Better Than

Degradation properties of phenol using nano-TiO2 as photocatalyst in aqueous solution were investigated. The effect of annealing temperature and ionic modification on the degradation was studied. The results showed that, 500 °C annealed TiO2 was better than 700 °C annealed. Photocatalyst nano-TiO2 material doped with Fe3+ was prepared quickly by sol-gel process and was used as photocatalyst to degrade phenol solution of 100mg/L under UV irradiation for 3 hours. UV spectrophotometer testing was made and found that two peaks at 210 nm and 270 nm were significantly become low, indicating that the phenol has been degraded. The phenol degradation rate was 94.18%.

scholarly journals Heating of Plant Oils-Fatty Acid Reactions versus Tocopherols Degradation

2009 ◽  
Vol 27 (Special Issue 1) ◽  
pp. S185-S187 ◽  
Author(s):  
Z. Réblová ◽  
D. Tichovská ◽  
M. Doležal
Keyword(s):  
Fatty Acid ◽  
Soybean Oil ◽  
Olive Oil ◽  
Vegetable Oils ◽  
Sunflower Oil ◽  
Rapeseed Oil ◽  
Degradation Rate ◽  
Plant Oils ◽  
Oil Sunflower ◽  
High Degradation Rate

Relationship between polymerised triacylglycerols formation and tocopherols degradation was studied during heating of four commercially accessible vegetable oils (rapeseed oil, classical sunflower oil, soybean oil and olive oil) on the heating plate with temperature 180°C. The content of polymerised triacylglycerols 6% (i.e. half of maximum acceptable content) was achieved after 5.3, 4.2, 4.1, and 2.6 hours of heating for olive oil, soybean oil, rapeseed oil and sunflower oil, respectively, while decrease in content of total tocopherols to 50% of the original content was achieved after 3.4, 1.6, 1.3, and 0.5 hours of heating for soybean oil, rapeseed oil, sunflower oil and olive oil, respectively. Because of the high degradation rate of tocopherols, decrease in content of total tocopherols to 50% of the original content was achieved at content of polymerised triacylglycerols 0.6%, 1.9%, 2.8% and 4.9% for olive oil, rapeseed oil, sunflower oil and soybean oil, respectively, i.e. markedly previous to the frying oil should be replaced.

Characterization of Microstructure and Composition of Plasma Electrolytic Oxide Film Formed on AZ31 Mg Alloy

2020 ◽  
Vol 860 ◽  
pp. 213-217
Author(s):  
Efrina Hidayati ◽  
Anawati Anawati
Keyword(s):  
Degradation Rate ◽  
High Surface ◽  
Mg Alloy ◽  
Constant Current ◽  
X Ray Diffraction ◽  
Time Curve ◽  
Biodegradable Implant ◽  
Az31 Mg Alloy ◽  
Plasma Electrolytic

Magnesium alloy has been widely investigated as a biodegradable implant material owing to its unique properties to degrade spontaneously in human body fluid without causing toxicity. However, the degradation rate needs to be controlled. An effective way to lower down the degradation rate of Mg alloy is by coating with plasma electrolytic oxidation (PEO) technique. In this research, the microstructure and mechanical hardness of the PEO film formed on AZ31 were investigated. The film was prepared under a constant current of 400 A/m2 in the Na3PO4 solution at 30°C. The voltage-time curve showed an immediate increase of current during the first 25 s before reaching a steady-state voltage of 150 V. The spark discharge revealed as white micro discharges. The film formed for 3 min exhibited a high surface roughness with a large variety of thickness in the range of 1-20 µm. The film contained pores and cracks. The big pores with diameter size 10-20 µm were formed as a result of gas entrapment, while the small pores with a radius of 1-3 µm were associated with the discharge tunnel during the PEO process. The X-ray diffraction pattern indicated that the film composed of crystalline Mg3(PO4)2.

Nano-Precipitated Phase and Evolution of Al-Cu-Mg Alloy Subjected to Rapid Cold Stamping

2019 ◽  
Vol 11 (9) ◽  
pp. 1318-1326
Author(s):  
Caihe Fan ◽  
Ling Ou ◽  
Jianjun Yang ◽  
Xihong Chen
Keyword(s):  
Boundary Diffusion ◽  
Hardness Test ◽  
S Phase ◽  
Mg Alloy ◽  
Fine Grained ◽  
Precipitated Phase ◽  
Transmission Electron ◽  
Three Stages ◽  
Cold Stamping ◽  
Precipitation Phase

High-resolution transmission electron microscopy, energy dispersive spectroscopy, and hardness test were used to study the nano-precipitates and evolution of nano-precipitation of the sprayformed fine-grained Al-Cu-Mg alloy during rapid cold stamping deformation. Results show that the elongated S-phase and the acicular ' phase of the Al-Cu-Mg alloy after three passes of cold stamping of rapid cold-shock deformation undergoes re-dissolution, and a large number of the fine granular balance  phases are precipitated after four passes of rapid cold-stamping deformation. The main mechanism of low-temperature re-dissolution of S' phase and ' phase in Al-Cu-Mg alloy induced by rapid cold stamping deformation is the precipitation phase fracture, grain boundary diffusion, and vacancy diffusion. The change in the hardness of the alloy during rapid cold stamping deformation is affected by the combination of phase-resolving softening, work hardening, and reprecipitation strengthening and increases at three stages. The hardness increases from 55 HB to 125 HB, which is increased by 127%.

scholarly journals Study on process development and property evaluation of sol-gel derived magnesia stabilized zirconia minispheres

2014 ◽  
Vol 32 (2) ◽  
pp. 145-156 ◽  
Author(s):  
J. Judes ◽  
V. Kamaraj
Keyword(s):  
Mechanical Properties ◽  
Process Development ◽  
Sintering Temperature ◽  
Sol Gel ◽  
Processing Parameters ◽  
Processing Technique ◽  
Density Variation ◽  
Phase Identification ◽  
Stabilized Zirconia ◽  
Grinding Media

AbstractIn order to overcome limitations in the processing parameters of powder compaction method, a novel processing technique based on sol-gel route has been developed to produce near-net-shaped prototype fine zirconia minispheres with required properties that could potentially be used as grinding media. Impact of magnesia concentration and sintering temperature on the final product has been analyzed in detail. Zirconia minispheres have been characterized to establish a correlation between physical, structural and mechanical properties. Sintering temperature, soaking period, heating rate and viscosity of the sol apparently influence the characteristics of the magnesia stabilized zirconia minispheres. The phase identification, density variation, chemical decomposition, functional group specification, surface area, porosity, shrinkage and microstructural features of the dried and sintered final product have been studied. It has been observed that magnesia content, sintering temperature, density and the grain size of the sintered minispheres have a significant impact on the mechanical properties of the final product.

Fabrication of Al-Sn Composites from Direct Recycling Aluminium Alloy 6061

2013 ◽  
Vol 465-466 ◽  
pp. 1003-1007
Author(s):  
Nur Azam Badarulzaman ◽  
Siti Rodiah Karim ◽  
Mohd Amri Lajis
Keyword(s):  
Tensile Strength ◽  
Constant Pressure ◽  
Sintering Temperature ◽  
Direct Conversion ◽  
Cold Forging ◽  
Composition Analysis ◽  
Optimum Result ◽  
Metal Metal ◽  
Alloy 6061 ◽  
Single Size

Solid-state direct conversion method of recycled aluminium 6061 alloy to produce metal-metal composites was studied by using collected recycle chip. Different volume percent of stannum (Sn) matrix was studied to attempt the tensile strength and surface integrity of the aluminium composites product. Constant pressure was used to implement the cold forging process with constant sintering temperature. Single size of chip had been used which 2 mm length as suggested. The optimum result of yield strength and ultimate tensile strength is 3 Pa and 8.3 Pa for 20 vol% of Sn composition. Analysis shows that composites beyond 20 vol% Sn resulted in the tensile strength decreased.

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