Control of magnesium in vitro degradation based on ultrafine-grained surface gradient structure using ultrasonic nanocrystalline surface modification

Baek, Seung-Min; Choi, Il Yong; Moon, Jong Ha; Umarov, Rakhmatjon; Kim, Jaehwan; Kim, Nack J.; Kim, Jong Kyu; Amanov, Auezhan; Kim, Hyoung Seop

doi:10.1016/j.mtla.2020.100821

Cited by 12 publications

(18 citation statements)

References 43 publications

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“…Lower SR by UNSM can be achieved with lower feed rates and shorter stepover distances. The decrease in roughness for the LZ91 sample is due to the lower load of 1.4 N [45], which is less disruptive than the 5, 20, and 85 N loads reported in other studies [42][43][44].…”

Section: Surface Integrity Of Unsmmentioning

confidence: 49%

“…The formation of twinning can also be measured through the in-depth hardness in Figure 17d, where it has a peak of 95 HV and is decaying to the bulk material hardness at 500 µm. At higher static forces, there is grain refinement at the surface, as seen in Figure 17e,f, which decreases with depth when 20 N is applied to the ZX11 sample [44].…”

Section: Surface Integrity Of Unsmmentioning

confidence: 93%

“…UNSM-treated AZ91 showed a very high hardness increase from 215 HV (bulk) to 295 HV [72]. With variations on the static loading of 5 N [42], 20 N [44], and 85 N [43], the plastic deformation is steadily raised. This results in the formation of twins in AZ31B, as shown in Figure 17c (as indicated by the red arrows in the figure).…”

Section: Surface Integrity Of Unsmmentioning

confidence: 97%

“…On the other hand, Hou et al reported ginal mass loss for AZ31 in 24 h of immersion when UNSMed was at a load of 5 N (Fi 18b) [42]. [42,44,45], (b) hardness change [42,44,72], (c) grain refinement (red arrows indicate twinning formation due to UNSW while red circle the untreated grains of larger size) [42], and (d-f) microstructural change [44].…”

Section: Corrosion Performance Of Unsmmentioning

confidence: 99%

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Mechanical Surface Treatments for Controlling Surface Integrity and Corrosion Resistance of Mg Alloy Implants: A Review

Santos

Uddin

Hall

2023

JFB

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The present paper aims to provide an overview of the current state-of-the-art mechanical surface modification technologies and their response in terms of surface roughness, surface texture, and microstructural change due to cold work-hardening, affecting the surface integrity and corrosion resistance of different Mg alloys. The process mechanics of five main treatment strategies, namely, shot peening, surface mechanical attrition treatment, laser shock peening, ball burnishing, and ultrasonic nanocrystal surface modification, were discussed. The influence of the process parameters on plastic deformation and degradation characteristics was thoroughly reviewed and compared from the perspectives of surface roughness, grain modification, hardness, residual stress, and corrosion resistance over short- and long-term periods. Potential and advances in new and emerging hybrid and in-situ surface treatment strategies were comprehensively eluded and summarised. This review takes a holistic approach to identifying the fundamentals, pros, and cons of each process, thereby contributing to bridging the current gap and challenge in surface modification technology for Mg alloys. To conclude, a brief summary and future outlook resulting from the discussion were presented. The findings would offer a useful insight and guide for researchers to focus on developing new surface treatment routes to resolve surface integrity and early degradation problems for successful application of biodegradable Mg alloy implants.

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Section: Surface Integrity Of Unsmmentioning

confidence: 49%

Section: Surface Integrity Of Unsmmentioning

confidence: 93%

Section: Surface Integrity Of Unsmmentioning

confidence: 97%

Section: Corrosion Performance Of Unsmmentioning

confidence: 99%

See 2 more Smart Citations

Mechanical Surface Treatments for Controlling Surface Integrity and Corrosion Resistance of Mg Alloy Implants: A Review

Santos

Uddin

Hall

2023

JFB

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“…Under an inert atmosphere of a CO 2 and SF 6 mixture, Mg-1.0 wt %/Zn-1.0 wt %/Ca alloy (ZX11) was prepared by induction melting using a steel crucible . The composition of the alloy was measured by inductively coupled plasma–mass spectrometry (ICP-MS) (Thermo Xseries II, Thermo Scientific, Waltham, MA).…”

Section: Methodsmentioning

confidence: 99%

Biocompatible Magnesium Implant Double-Coated with Dexamethasone-Loaded Black Phosphorus and Poly(lactide-co-glycolide)

Lee

Baek

Lee

et al. 2020

ACS Appl. Bio Mater.

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Magnesium (Mg) and its alloys have presented a paradigm for biodegradability in the field of biomedical devices. However, biodegradation of Mg and its alloys cause the formation of hydrogen gas and basic molecules in the body. Here we developed a surface modification method for Mg implants by double-coating with osteogenic dexamethasone (Dex)-loaded black phosphorus (BP) and poly(lactide-co-glycolide) (PLGA). According to electrochemical and biodegradation tests, the prepared Mg-Dex/BP/PLGA showed remarkably enhanced resistance against corrosion possibly by the neutralization of basic molecules from Mg implants with acidic molecules from BP and PLGA with increasing biodegradation. Scanning electron microscopy, cell proliferation tests, Alizarin Red staining, and alkaline phosphatase activity tests confirmed that MC3T3-E1 cells significantly proliferated and were differentiated on the Mg-Dex/BP/PLGA surface. Taken together, the facile surface modification of Mg implants could be effectively harnessed for protecting the Mg surface from corrosion and inducing the osseointegration of preosteoblasts onto the Mg implant.

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Ultrasonic nanocrystalline surface modification of low strength aluminum alloy: trade-off between surface integrity and production rate aiming at desired fatigue life

Azhiri

Jadidi

Bideskan

et al. 2021

Int J Adv Manuf Technol

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Control of magnesium in vitro degradation based on ultrafine-grained surface gradient structure using ultrasonic nanocrystalline surface modification

Cited by 12 publications

References 43 publications

Mechanical Surface Treatments for Controlling Surface Integrity and Corrosion Resistance of Mg Alloy Implants: A Review

Mechanical Surface Treatments for Controlling Surface Integrity and Corrosion Resistance of Mg Alloy Implants: A Review

Biocompatible Magnesium Implant Double-Coated with Dexamethasone-Loaded Black Phosphorus and Poly(lactide-co-glycolide)

Ultrasonic nanocrystalline surface modification of low strength aluminum alloy: trade-off between surface integrity and production rate aiming at desired fatigue life

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