Relation between LPSO structure and biocorrosion behavior of biodegradable GZ51K alloy

Zhang, Xiaobo; Wang, Qian; Chen, Fengbin; Wu, Yixuan; Wang, Zhangzhong; Wang, Qiang

doi:10.1016/j.matlet.2014.09.133

Cited by 46 publications

(17 citation statements)

References 12 publications

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Section: Corrosion Behaviorsupporting

confidence: 84%

“…The initial corrosion starts at the interface of the LPSO phase and α-Mg matrix. Similar corrosion behavior was also reported for the Mg-Zn-Gd-Zr alloys and Mg-Y-Er-Zn alloys containing the LPSO phase [27,36]. SEM micrographs of the cross sections and the results of the EDS analysis performed on selected areas of the MMC after 24 h of immersion in 1 wt % NaCl solution are shown in Figure 10.…”

Section: Corrosion Behaviorsupporting

confidence: 77%

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Mechanical Properties and Corrosion Behavior of WZ73 Mg Alloy/SiCp Composite Fabricated by Stir Casting Method

Chiu

Liu

2018

Metals

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Low strength, which limits the industrial applications of Mg alloys, can be improved by forming Mg-based metal matrix composites (MMC) reinforced with ceramic particles. In this study, a Mg-based MMC was synthesized by introducing SiC particles into a WZ73 Mg alloy using the stir casting method. The effects of the SiC particles on the mechanical properties and corrosion behavior of WZ73 alloys were studied. The results showed that an addition of 1.5 vol % of SiC enhanced the strength of a WZ73 alloy but reduced the corrosion resistance. A further increase of SiC to 2.5 vol % had no effects on strength and corrosion behavior, which was attributed to the agglomeration of SiC particles. A microstructural analysis indicated that the addition of SiC did not alter the morphology and distribution of the secondary phase in the WZ73 alloy. Thus, the improved strength was attributed to the reinforcement of SiC and the refinement of the Mg grain, while the degraded corrosion resistance was the result of the grain refinement of Mg and the presence of the Mg/SiC interface in the vicinity of the secondary phase, which breaks the continuity of the Mg matrix and results in a higher corrosion rate.

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Section: Corrosion Behaviorsupporting

confidence: 84%

Section: Corrosion Behaviorsupporting

confidence: 77%

Mechanical Properties and Corrosion Behavior of WZ73 Mg Alloy/SiCp Composite Fabricated by Stir Casting Method

Chiu

Liu

2018

Metals

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“…It was observed that the as-cast GZ51K alloy with LPSO structure exhibits better corrosion resistance and a more uniform corrosion mode than aging-treated alloys without LPSO structure. We also found that the corrosion resistance of the GZ51K alloy correlated to the fraction of LPSO structure: a higher fraction of the LPSO structure leads to better corrosion resistance, as shown in Figures 12 and 13, respectively (Zhang et al, 2015). The alloy with the LPSO structure has a uniform corrosion mode, while that without the LPSO structure undergoes localized corrosion, as shown in Figure 14.…”

Section: Heat Treatmentmentioning

confidence: 67%

“…The LPSO structure plays a very important role in the corrosion behavior of Mg alloys (Leng et al, 2013;Peng et al, 2014;Zhang, Wu, Xue, Wang, & Yang, 2012c;Zhang et al, 2014a;Zhang et al, 2015). Zhang et al (2012c) reported that corrosion rate of the as-extruded Mg-11.3Gd-2.5Zn-0.7Zr alloy with LPSO structure in SBF is only 0.17 mm/year, while that of the as-extruded Mg-10.2Gd-3.3Y-0.6Zr alloy without LPSO structure is 0.55 mm/year.…”

Section: The Improvement Of Corrosion Behavior By Lpso Structurementioning

confidence: 99%

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Improvement of corrosion resistance of magnesium alloys for biomedical applications

Chen¹,

Dai²,

Zhang³

2015

Corrosion Reviews

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In recent years, magnesium (Mg) alloys have attracted great attention due to superior biocompatibility, biodegradability, and other characteristics important for use in biodegradable implants. However, the development of Mg alloys for clinical application continues to be hindered by high corrosion rates and localized corrosion modes, both of which are detrimental to the mechanical integrity of a load-bearing temporary implant. To overcome these challenges, technologies have been developed to improve the corrosion resistance of Mg alloys, among which surface treatment is the most common way to enhance not only the corrosion resistance, but also the bioactivity of biodegradable Mg alloys. Nevertheless, surface treatments are unable to fundamentally solve the problems of fast corrosion rate and localized corrosion. Therefore, it is of great importance to alter and improve the intrinsic corrosion behavior of Mg alloys for biomedical applications. To show the significance of the intrinsic corrosion resistance of biodegradable Mg alloys and attract much attention on this issue, this article presents a review of the improvements made to enhance intrinsic corrosion resistance of Mg alloys in recent years through the design and preparation of the Mg alloys, including purifying, alloying, grain refinement, and heat treatment techniques. The influence of long-period stacking-ordered structure on corrosion behavior of the biodegradable Mg alloys is also discussed.

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Corrosion Behaviors of Long‐Period Stacking Ordered Structure in Mg Alloys Used in Biomaterials: A Review

et al. 2018

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The long‐period stacking ordered (LPSO) phases have distinctive microstructures and significant effect on the promotion of mechanical properties of Mg alloys, which have received considerable attention not only as industrial materials but also as biodegradable implant materials recently. By now, numerous researchers devote to study the effects of the microstructures of LPSO phases on the mechanical properties of Mg alloys. But a few of them reveal the relationship between LPSO phases and corrosion behaviors of Mg alloys. Therefore, the knowledge of characteristics of LPSO phases and their effects on biocorrosion behaviors is essential. In this review, the current understanding about the structure, growth, transformation, and deformation of LPSO phases in Mg alloys are summarized. The recent developments of biocorrosion behaviors of Mg alloys are reviewed. The information on the immersion and corrosion mechanisms of Mg alloys are provided. The role of LPSO structures on corrosion behaviors of Mg alloys is intensively analyzed. Based on the current understandings, some problems are pointed out and suggestions for further research of Mg alloys with LPSO structures using as biomedical materials are provided.

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Relation between LPSO structure and biocorrosion behavior of biodegradable GZ51K alloy

Cited by 46 publications

References 12 publications

Mechanical Properties and Corrosion Behavior of WZ73 Mg Alloy/SiCp Composite Fabricated by Stir Casting Method

Mechanical Properties and Corrosion Behavior of WZ73 Mg Alloy/SiCp Composite Fabricated by Stir Casting Method

Improvement of corrosion resistance of magnesium alloys for biomedical applications

Corrosion Behaviors of Long‐Period Stacking Ordered Structure in Mg Alloys Used in Biomaterials: A Review

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