Microstructure of Hydroxyapatite/Collagen Coating on AZ31 Magnesium Alloy by a Solution Treatment

Bao, Quan He; Zhao, Li Qing; He, Jing; Xu, Qi

doi:10.4028/www.scientific.net/jbbbe.30.38

Cited by 8 publications

(3 citation statements)

References 20 publications

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“…Collagen coating can be applied to Ti and Mg alloys, according to reports. In cell culture experiments, collagen-coated Ti and Mg alloys can induce cell proliferation and osteoblast phenotype expression [78]. In similar study, Park et al [79] investigated the use of collagen film/fiber coating on Mg alloy stents to increase corrosion resistance and biocompatibility.…”

Section: Collagen Coated On Mg-based Alloymentioning

confidence: 99%

A Comprehensive Review on Surface Modifications of Biodegradable Magnesium-Based Implant Alloy: Polymer Coatings Opportunities and Challenges

et al. 2021

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The development of biodegradable implants is certainly intriguing, and magnesium and its alloys are considered significant among the various biodegradable materials. Nevertheless, the fast degradation, the generation of a significant amount of hydrogen gas, and the escalation in the pH value of the body solution are significant barriers to their use as an implant material. The appropriate approach is able to solve this issue, resulting in a decrease the rate of Mg degradation, which can be accomplished by alloying, surface adjustment, and mechanical treatment. Surface modification is a practical option because it not only improves corrosion resistance but also prepares a treated surface to improve bone regeneration and cell attachment. Metal coatings, ceramic coatings, and permanent polymers were shown to minimize degradation rates, but inflammation and foreign body responses were also suggested. In contrast to permanent materials, the bioabsorbable polymers normally show the desired biocompatibility. In order to improve the performance of drugs, they are generally encapsulated in biodegradable polymers. This study summarized the most recent advancements in manufacturing polymeric coatings on Mg alloys. The related corrosion resistance enhancement strategies and future potentials are discussed. Ultimately, the major challenges and difficulties are presented with aim of the development of polymer-coated Mg-based implant materials.

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Section: Collagen Coated On Mg-based Alloymentioning

confidence: 99%

A Comprehensive Review on Surface Modifications of Biodegradable Magnesium-Based Implant Alloy: Polymer Coatings Opportunities and Challenges

et al. 2021

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“…Biomimetic coating combining HA and collagen significantly improves corrosion resistance compared to HA-coated and uncoated substrates due to their chemical stability and less dissolution of Mg 2+ ions (Bao et al, 2017). However, HA/collagen coated AZ31 Mg alloy sample shows excellent chemical bonding between HA/collagen like natural bone and suppresses the sudden release of Mg 2+ ions and with pH value increment of the Hank's solution the degradation rate is reduced with improved corrosion resistance (Wang et al, 2013).…”

Section: Biomimetic Coatingmentioning

confidence: 99%

Magnesium Alloys With Tunable Interfaces as Bone Implant Materials

Rahman

Dutta

Choudhury

2020

Front. Bioeng. Biotechnol.

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Magnesium (Mg) based biodegradable materials are a new generation orthopedic implant materials that are intended to possess same mechanical properties as that of bone. Mg alloys are considered as promising substitutes to permanent implants due to their biodegradability in the physiological environment. However, rapid corrosion rate is one of the major constraints of using Mg alloys in clinical applications in spite of their excellent biocompatibility. Approaches to overcome the limitations include the selection of adequate alloying elements, proper surface treatment, surface modification with coating to control the degradation rate. This review focuses on current advances on surface engineering of Mg based biomaterials for biomedical applications. The review begins with a description of corrosion mechanism of Mg alloy, the requirement for appropriate surface functionalization/coatings, their structure-property-performance relationship, and suitability for biomedical applications. The control of physico-chemical properties such as wettability, surface morphology, surface chemistry, and surface functional groups of the coating tailored by various approaches forms the pivotal part of the review. Chemical surface treatment offers initial protection from corrosion and inorganic coating like hydroxyapatite (HA) improves the biocompatibility of the substrate. Considering the demand of ideal implant materials, multilayer hybrid coatings on Mg alloy in combination with chemical pretreatment or inorganic HA coating, and protein-based polymer coating could be a promising technique to improve corrosion resistance and promote biocompatibility of Mg-based alloys.

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“…The HA coating on titanium alloy was made by a number of methods, namely ion deposition, hydroprocessing, plasma spraying and so on. Out of numerous accessible coating techniques, electric discharge machining (EDM) technique is one out of the effective, economical and simplest procedures to deposit biomimetic layer and biocompatible layer on the surface of implant to ameliorate resistance of corrosion, mechanical properties and bioactivity (Bao et al, 2017). Though, the recast layer produced by EDM is normally brittle and hard and might consist of pores and cracks, with tensile residual stress, which has greatly influenced the performance of material in proposed applications (Khullar et al, 2017).…”

mentioning

confidence: 99%

Parametric optimization of EDD using RSM-Grey-TLBO-based MCDM approach for commercially pure titanium

Sharma

Ahuja

Goyal

et al. 2020

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PurposeElectric discharge drilling (EDD) is used to drill quality microholes on any conductive materials. EDD process parameters play a crucial role in the drilling. Depending upon the material characteristics, the cost of drilling also changes. Therefore, a suitable method is required to control the process parameters and drill quality microholes.Design/methodology/approachThe input process parameters in the present work are peak current (Ip), pulse on-time (Ton) and pulse off-time (Toff). The trials were intended in accordance to central composite face-centered design of response surface methodology (RSM). The output responses, namely drilling rate (DR) and electrode wear ratio (EWR), were converted into a single response, that is, grade using Grey relational analysis (GRA). The grade value is further modeled by regression analysis. The empirical model was figured out using teaching–learning-based optimization (TLBO). The RSM-Grey-TLBO-based multicriteria decision-making (MCDM) is used to investigate the optimized process parameter setting.FindingsThe RSM-Grey-TLBO-based MCDM approach suggests that the optimized setting for DR and EWR is Ip: 3A; Ton: 40 µs; Toff: 42 µs. The percentage errors for the predicted and experimental results are 8.1 and 7.5% in DR and EWR, respectively.Originality/valueThe parametric optimization of EDD using RSM-Grey-TLBO-based MCDM approach while machining commercially pure titanium is still underway. Thus, this MCDM approach will give a path to the researchers working in this direction.

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Microstructure of Hydroxyapatite/Collagen Coating on AZ31 Magnesium Alloy by a Solution Treatment

Cited by 8 publications

References 20 publications

A Comprehensive Review on Surface Modifications of Biodegradable Magnesium-Based Implant Alloy: Polymer Coatings Opportunities and Challenges

A Comprehensive Review on Surface Modifications of Biodegradable Magnesium-Based Implant Alloy: Polymer Coatings Opportunities and Challenges

Magnesium Alloys With Tunable Interfaces as Bone Implant Materials

Parametric optimization of EDD using RSM-Grey-TLBO-based MCDM approach for commercially pure titanium

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