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Role of biomineralization on the degradation of fine grained AZ31 magnesium alloy processed by groove pressing
B. Ratna Sunil, Arun Anil Kumar, ,
Published in Elsevier
2013
PMID: 23827614
Volume: 33
   
Issue: 3
Pages: 1607 - 1615
Abstract
Groove pressing (GP) has been successfully adopted to achieve fine grain size up to 7 μm in AZ31 magnesium alloy with an initial grain size of 55 μm. The effect of microstructural evolution and surface features on wettability, corrosion resistance, bioactivity and cell adhesion were investigated with an emphasis to study the influence of deposited phases when the samples were immersed in simulated body fluid (SBF 5 ×). The role of microstructure was also evaluated without any surface treatments or coatings on the material. GPed samples exhibit improved hydrophilicity compared to the annealed sample. After immersion in SBF, specimens were characterized using scanning electron microscopy (SEM), energy dispersive X-ray (EDAX) analysis and X-ray diffraction (XRD) methods. More amount of white precipitates composed of hydroxyapatite and magnesium phosphate along with magnesium hydroxide was observed on the surfaces of groove pressed specimens as compared to the annealed specimens with an increase in immersion time in SBF. Corrosion behavior of the samples estimated using potentiodynamic polarization curves indicate good corrosion resistance for GPed samples before and after immersion in SBF. The MTT assay using rat skeletal muscle (L6) cells revealed that both the processed and unprocessed samples are nontoxic and cell adhesion was promising for GPed sample. © 2013 Elsevier B.V. All Rights Reserved.
About the journal
JournalData powered by TypesetMaterials Science and Engineering C
PublisherData powered by TypesetElsevier
ISSN09284931
Open AccessNo
Concepts (64)
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    Annealed samples
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    AZ31 MAGNESIUM ALLOY
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    Corrosion behavior
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    Energy dispersive x-ray
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    Fine grained
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    Fine grains
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    GROOVE PRESSING
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    IMMERSION TIME
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    Initial grain size
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    Magnesium hydroxide
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    MAGNESIUM PHOSPHATES
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    Mtt assays
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    POTENTIODYNAMIC POLARIZATION CURVES
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    RAT SKELETAL MUSCLE
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    Simulated body fluids
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    SURFACE FEATURE
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    Aluminum sheet
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    Biomineralization
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    Cell adhesion
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    Corrosion resistance
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    Grain refinement
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    Grain size and shape
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    Hydroxyapatite
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    OCEAN HABITATS
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    Scanning electron microscopy
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    Wetting
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    X ray diffraction
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    Magnesium alloys
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    Alloy
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    Biomaterial
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    Magnesium
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    Mineral
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    Animal
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    Article
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    AZ31 MAGNESIUM ALLOY
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    Cell culture
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    Cell death
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    Cell survival
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    Corrosion
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    Cytology
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    Drug effect
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    GROOVE PRESSING
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    Materials testing
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    Methodology
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    Particle size
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    Rat
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    Skeletal muscle
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    Spectrometry
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    Wettability
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    Drug effects
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    Procedures
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    AZ31 MAGNESIUM ALLOY
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    GROOVE PRESSING
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    Alloys
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    Animals
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    Biocompatible materials
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    Cells, cultured
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    Microscopy, electron, scanning
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    Minerals
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    MUSCLE, SKELETAL
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    Rats
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    Spectrometry, x-ray emission
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    X-ray diffraction
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    MUSCLE, SKELETAL