Laser direct deposited transparent magnesium aluminate spinel ceramics

Biomedical implants are important devices used for the repair or replacement of damaged or diseased tissues or organs. The success of implantation depends on various factors, such as mechanical properties, biocompatibility, and biodegradability of the materials used. Recently, magnesium (Mg)-based materials have emerged as a promising class of temporary implants due to their remarkable properties, such as strength, biocompatibility, biodegradability, and bioactivity. This review article aims to provide a comprehensive overview of current research works summarizing the above-mentioned properties of Mg-based materials for use as temporary implants. The key findings from in-vitro, in-vivo, and clinical trials are also discussed. Further, the potential applications of Mg-based implants and the applicable fabrication methods are also reviewed.

show abstract

“… Setup for laser direct deposition as proposed by Pappas and Dong [ 139 ] (SFF symposium proceedings, open access publication). …”

Section: Figurementioning

confidence: 99%

Magnesium-Based Temporary Implants: Potential, Current Status, Applications, and Challenges

Seetharaman

Sankaranarayanan

Gupta

2023

JFB

View full text Add to dashboard Cite

show abstract

“…Furthermore, a broad range of alloys and composites are compatible with this process and the same equipment is required for all cases. In the last years, the potential of this technology pushed interest further with several studies devoted to metallurgy, with a particular focus on ceramic [3,4] and composite materials as Metal Matrix Composites (MMCs) [5,6], process monitoring [7,8] and modeling [9,10].…”

Section: Introductionmentioning

confidence: 99%

Multilayered Wc–Co Coatings by Direct Energy Deposition-Based Cladding: Effect of Laser Remelting on Interface Defects

Liverani

Ascari

Fortunato

2023

Preprint

View full text Add to dashboard Cite

“…The initial focus of the research was to manipulate the properties of spinel single crystals [27]. After the advent of nanotechnology, different morphological forms, for example, nanoplates [28], nanotubes composites [29] and nanopowders were also studied [30,31]. The optical properties were mostly enhanced using rare earth cations, for example, Eu 3+ [32], Tb 3+ [33], and Dy 3+ [34].…”

Section: Introductionmentioning

confidence: 99%

Doped MgAl₂O₄ semiconductor host nanopowders for tunable primary color emissions for application as white LEDs

Ain¹,

Ismail²,

Khan³

et al. 2021

Semicond. Sci. Technol.

View full text Add to dashboard Cite

The emission of white light from hosts having a single phase and the compromised applicability of a very inert, chemically stable, and structurally diverse MgAl2O4 led to a quest for improving the structural, optical, thermal and electrical properties for more innovative applications. A slight modification in lattice site occupation can lead to antisite defects which alter the physical properties of the materials. The presence of larger alkaline earth Sr2+ cations at the T-sites have been found to improve the behavior of the activator Mn2+ cations which are substituted for Mg2+ at T-sites. In the current study, a series of Mn2+ doped derivatives having a general formula of Mg1−x−0.3Mn x Sr0.3Al2O4 (x = 0.1–0.5) were synthesized using the chemical co-precipitation method. Due to the larger radius of Sr2+ cations, the lattice strain was observed in the cubic crystal structure of magnesium aluminate spinel (MAS). A decrease in the bandgaps of the doped samples indicates the formation of defect states within the bandgap of MAS. Apart from the bandgap transitions, the capture of electrons at oxygen vacancies is also observed in the UV/Vis spectra. The strong tetrahedral site preference of Mn2+ is altered by the presence of Sr2+, hence, some octahedral site occupation of Mn2+ in the lattice is achieved. The antisite defects along with the occupation of both T- and O-sites by Mn2+ resulted in novel emission bands centered at 464 nm (blue), 515 nm (green), and 621 nm (red) at λ ex of 380 nm. The emission of the primary colors in a simple lattice with cost-effective and in-toxic constituents can be a possible alternative to the costly rare-earth ions doped complex materials in use to-date.

show abstract

Laser direct deposited transparent magnesium aluminate spinel ceramics

Cited by 18 publications

References 17 publications

Magnesium-Based Temporary Implants: Potential, Current Status, Applications, and Challenges

Magnesium-Based Temporary Implants: Potential, Current Status, Applications, and Challenges

Multilayered Wc–Co Coatings by Direct Energy Deposition-Based Cladding: Effect of Laser Remelting on Interface Defects

Doped MgAl₂O₄ semiconductor host nanopowders for tunable primary color emissions for application as white LEDs

Contact Info

Product

Resources

About

Laser direct deposited transparent magnesium aluminate spinel ceramics

Cited by 18 publications

References 17 publications

Magnesium-Based Temporary Implants: Potential, Current Status, Applications, and Challenges

Magnesium-Based Temporary Implants: Potential, Current Status, Applications, and Challenges

Multilayered Wc–Co Coatings by Direct Energy Deposition-Based Cladding: Effect of Laser Remelting on Interface Defects

Doped MgAl2O4 semiconductor host nanopowders for tunable primary color emissions for application as white LEDs

Contact Info

Product

Resources

About

Doped MgAl₂O₄ semiconductor host nanopowders for tunable primary color emissions for application as white LEDs