Enhancement of mechanical properties and corrosion resistance of Mg–Ca alloys through microstructural refinement by indirect extrusion

Jeong, Yeong Seung; Kim, Woo Jin

doi:10.1016/j.corsci.2014.01.041

Cited by 217 publications

(114 citation statements)

References 29 publications

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“…Ca is a major component in human bones and is beneficial for bone healing and growth [127,139,152]. It is widely utilized as alloying element for biodegradable Mg alloys.…”

Section: Calciummentioning

confidence: 99%

Mg and Its Alloys for Biomedical Applications: Exploring Corrosion and Its Interplay with Mechanical Failure

Peron

Torgersen

Berto

2017

Metals

102

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Abstract:The future of biomaterial design will rely on temporary implant materials that degrade while tissues grow, releasing no toxic species during degradation and no residue after full regeneration of the targeted anatomic site. In this aspect, Mg and its alloys are receiving increasing attention because they allow both mechanical strength and biodegradability. Yet their use as biomedical implants is limited due to their poor corrosion resistance and the consequential mechanical integrity problems leading to corrosion assisted cracking. This review provides the reader with an overview of current biomaterials, their stringent mechanical and chemical requirements and the potential of Mg alloys to fulfil them. We provide insight into corrosion mechanisms of Mg and its alloys, the fundamentals and established models behind stress corrosion cracking and corrosion fatigue. We explain Mgs unique negative differential effect and approaches to describe it. Finally, we go into depth on corrosion improvements, reviewing literature on high purity Mg, on the effect of alloying elements and their tolerance levels, as well as research on surface treatments that allow to tune degradation kinetics. Bridging fundamentals aspects with current research activities in the field, this review intends to give a substantial overview for all interested readers; potential and current researchers and practitioners of the future not yet familiar with this promising material.

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“…Ca is a major component in human bones and is beneficial for bone healing and growth [127,139,152]. It is widely utilized as alloying element for biodegradable Mg alloys.…”

Section: Calciummentioning

confidence: 99%

Mg and Its Alloys for Biomedical Applications: Exploring Corrosion and Its Interplay with Mechanical Failure

Peron

Torgersen

Berto

2017

Metals

102

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“…[35] Therefore, the finer the crystallite, the higher the strength of Mg or Mg-based alloy or Mg matrix composite. The initial crystallite size of pure Mg (194 nm) refined to 21 and 12 nm for the Mg-Zn alloy and Mg-Zn/HA composite, respectively.…”

Section: E Effect Of Ha Content On Corrosion Behaviormentioning

confidence: 99%

Enhanced Mechanical Properties and Corrosion Behavior of Biodegradable Mg-Zn/HA Composite

Salleh

Hussain

Ramakrishnan

et al. 2017

Metall Mater Trans A

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Magnesium (Mg) and its alloys have shown potential for use in the biomedical industry due to their excellent biological performance and biodegradability in the bioenvironment. Thus, the aim of the present study was to develop a reliable biodegradable hard tissue substituent. Biodegradable and bioactive Mg-Zinc (Zn) reinforced by hydroxyapatite (HA) composite was prepared using mechanically alloyed Mg-6.5 wt pct Zn and pure HA powders as starting materials. Various HA contents (i.e., 5, 10, 15, and 20 wt pct) were introduced in forming the Mg-Zn/HA composite. The effect of bioactive HA incorporation in biodegradable Mg-6.5 wt pct Zn alloy matrix on mechanical and biodegradation properties as well as microstructural observation was investigated. As measured by the Williamson-Hall formula, the Mg crystallite size of the sintered composites containing 5, 10, 15, and 20 wt pct HA were 36.76, 29.08, 27.93, and 27.31 nm, respectively. According to X-ray diffraction (XRD) analysis, there was no new crystalline phase formed during milling, indicating that no mechanochemical reactions between Mg-Zn alloy and HA occurred. The À1.70 V shifted significantly toward the passive position of the plain Mg-6.5 wt pct Zn alloy and Mg-Zn/10 wt pct HA composite, which were À1.50 and À1.46 V, respectively, indicating that the Mg-Zn/10 wt pct HA composite was least susceptible to corrosion in the bioenvironment.

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“…Calcium (Ca) is one of a small number of alloying elements that can be included in implants. In the as-cast state, as the Ca content increases, the strength increases but the ductility decreases [11,14]. When the Ca content is ≥1 wt.%, the corrosion resistance drastically decreases with further increases in the Ca content [11,14,15].…”

Section: Introductionmentioning

confidence: 96%

“…In the as-cast state, as the Ca content increases, the strength increases but the ductility decreases [11,14]. When the Ca content is ≥1 wt.%, the corrosion resistance drastically decreases with further increases in the Ca content [11,14,15]. Beside alloying, surface coating and thermo-mechanical processing of the Mg alloys have been explored by researchers as potential ways to slow the degradation process [16,17].…”

Section: Introductionmentioning

confidence: 99%

Mg-Ca binary alloy sheets with Ca contents of ≤1 wt.% with high corrosion resistance and high toughness

Seong

Kim

2015

Corrosion Science

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Enhancement of mechanical properties and corrosion resistance of Mg–Ca alloys through microstructural refinement by indirect extrusion

Cited by 217 publications

References 29 publications

Mg and Its Alloys for Biomedical Applications: Exploring Corrosion and Its Interplay with Mechanical Failure

Mg and Its Alloys for Biomedical Applications: Exploring Corrosion and Its Interplay with Mechanical Failure

Enhanced Mechanical Properties and Corrosion Behavior of Biodegradable Mg-Zn/HA Composite

Mg-Ca binary alloy sheets with Ca contents of ≤1 wt.% with high corrosion resistance and high toughness

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