scholarly journals A Brief Introduction on the Development of Ti-Based Metallic Glasses

2022 ◽  
Vol 8 ◽  
Author(s):  
M. Zhang ◽  
Y.Q. Song ◽  
H.J. Lin ◽  
Z. Li ◽  
W. Li
Keyword(s):  
Metallic Glasses ◽  
High Strength ◽  
Specific Strength ◽  
Glass Forming ◽  
High Specific Strength ◽  
Wear And Corrosion ◽  
Low Elastic Modulus ◽  
High Elasticity ◽  
Wear And Corrosion Resistance ◽  
Element Free

Ti-based metallic glasses (MGs) possess high specific strength, low elastic modulus, high elasticity, high wear and corrosion resistance, and excellent biocompatibility, which make them highly attractive as lightweight high-strength materials as well as biomaterials. However, the glass forming ability (GFA) of Ti-based MGs, particularly those bearing no toxic, noble, or heavy metals, that is, Be, Pd, or Cu alike, largely sets back their wide applications for the restricted critical glass forming size of these Ti-based MGs. In this review, the outlines in developing Ti-based MGs are delineated in order to provide an overall view on the efforts ever made to fabricate bulk size Ti-based MGs. The state of the art in the knowledge on the GFA of Ti-based MGs is briefly introduced, and possible directions for fabricating bulk size toxic and noble element free Ti-based MGs are discussed.

Mg–Ca–Zn Bulk Metallic Glasses with High Strength and Significant Ductility

2005 ◽  
Vol 20 (8) ◽  
pp. 1935-1938 ◽  
Author(s):  
X. Gu ◽  
G.J. Shiflet ◽  
F.Q. Guo ◽  
S.J. Poon
Keyword(s):  
Metallic Glasses ◽  
Amorphous Alloys ◽  
Mass Density ◽  
High Strength ◽  
Light Metal ◽  
Glass Forming Ability ◽  
Bulk Glass ◽  
Bulk Amorphous Alloys ◽  
Specific Strength ◽  
Glass Forming

The development of Mg–Ca–Zn metallic glasses with improved bulk glass forming ability, high strength, and significant ductility is reported. A typical size of at least 3–4 mm amorphous samples can be prepared using conventional casting techniques. By varying the composition, the mass density of these light metal based bulk amorphous alloys ranges from 2.0 to 3.0 g/cm3. The typical measured microhardness is 2.16 GPa, corresponding to a fracture strength of about 700 MPa and specific strength of around 250–300 MPa cm3/g. Unlike other Mg- or Ca-based metallic glasses, the present Mg–Ca–Zn amorphous alloys show significant ductility.

Estimate Biocompatibility and Injection-Molding Processability of Ti-Based Metallic Glasses for Dental Implant

2008 ◽  
Vol 57 ◽  
pp. 216-219
Author(s):  
Jeong Jung Oak ◽  
Hisamichi Kimura ◽  
Akihisa Inoue
Keyword(s):  
Corrosion Resistance ◽  
Metallic Glass ◽  
Metallic Glasses ◽  
High Corrosion Resistance ◽  
Specific Strength ◽  
Glass Forming ◽  
High Specific Strength ◽  
Medical Reports ◽  
Superior Corrosion Resistance

Recently, Ti-based metallic glasses aim at biomaterials with their high specific strength and superior corrosion resistance. Their high workability also shows a good performance for mass production under the energy saving environment. In this study, we started investigation of the design of Ti-based metallic glasses with the restricted alloying elements for biocompatibility and characteristic evaluation of the optimized Ti-based metallic glasses with higher glass forming ability for dental implants. These Ti-based metallic glasses do not contain Al, V and Ni elements which are well known to be neurotoxicity and cytotoxicity for human body. Current medical reports of impracticability by these elements have been a hot issue in biomaterials science. Newly designed Ti-based metallic glasses exhibit good performances. Especially, the optimized Ti-based metallic glass has high corrosion resistance with better passivity in a wide passivation range in simulated body fluids at 310K. In addition, biocompatibility of Ti-based metallic glass was also evaluated by cell culture in vitro. Excellent biocompatibility of Ti-based metallic glass show high potentials to be applied as biomaterials that necrosis of osteoblast (SaOS2) was not detected in this study.

Mg–Ni–(Gd,Nd) bulk metallic glasses with improved glass-forming ability and mechanical properties

2009 ◽  
Vol 24 (6) ◽  
pp. 2130-2140 ◽  
Author(s):  
J. Yin ◽  
G.Y. Yuan ◽  
Z.H. Chu ◽  
J. Zhang ◽  
W.J. Ding
Keyword(s):  
Metallic Glasses ◽  
Glass Forming Ability ◽  
Compressive Yield Strength ◽  
Specific Strength ◽  
Glass Forming ◽  
Copper Mold Casting ◽  
High Specific Strength ◽  
Mold Casting ◽  
Lightweight Engineering ◽  
High Level

In this work, we report a new Mg-based glass-forming system of Mg–Ni–(Gd,Nd), which can be produced into glassy rods with maximum diameters of 2–5 mm by copper mold casting. The Mg75Ni15Gd10–xNdx(x = 0–10) BMGs simultaneously possess a high level of glass transition temperatures, high specific strength up to 2.75 × 105 Nm/kg, and enhanced malleability with plastic strains over 1%. In particular, the Mg75Ni15Gd5Nd5 BMG with the glass-forming ability (GFA) up to 5 mm, exhibited compressive yield strength over 900 MPa and plastic strain up to 50% without failure for the specimen with an aspect ratio of 0.5. The improved GFA and malleability for the Mg75Ni15Gd10–x Ndx(x = 0–10) BMGs were discussed, which exhibited their promising potentials for the application as lightweight engineering materials.

scholarly journals Investigation of nanoporosities fabricated on metallic glass surface by hydroxyapatite mixed EDM for orthopedic application

2017 ◽  
Vol 13 (4-2) ◽  
pp. 523-528 ◽  
Author(s):  
Abdul Azeez Abdu Aliyu ◽  
Ahmad Majdi Abdul-Rani ◽  
Turnad Lenggo Ginta ◽  
Chander Prakash ◽  
Eugen Axinte ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Metallic Glasses ◽  
Glass Surface ◽  
Electrical Discharge Machining ◽  
Implant Surface ◽  
Bone Implant ◽  
Wear And Corrosion ◽  
Low Elastic Modulus ◽  
Wear And Corrosion Resistance ◽  
Living Tissues

Bulk metallic glasses (BMGs) have exceptional biomechanical characteristics like low elastic modulus, outstanding fracture strength, superior wear and corrosion resistance compared to routinely used biomaterials. The major downside of BMG is its inability to osteointegrate to the surrounding living tissues. To solve this problem, a biocompatible and bone-like nanoporous layer are normally imparted on the implant surface. In this study, a very hard, biocompatible and nano-porous layer was deposited on the Zr-based metallic glass surface, by hydroxyapatite mixed electrical discharge machining (HA-EDM). FESEM was employed to observe the pore distribution, geometry, and sizes. The result reveals the formation of rough, narrow craters and interconnected nanoporosities in the range of 558.2 nm to 893 nm in diameter and surface area of 244764 nm2 to 626596 nm2. However, the XRD and EDX characterization revealed the deposition of ZrC, TiC and CaTiO3 on the HA-EDMed surface. The surface produced by HA-EDM is expected to facilitate higher tissue in-growth and bone-implant adhesion.

scholarly journals Ti-Based Bulk Metallic Glasses with High Specific Strength

2004 ◽  
Vol 45 (2) ◽  
pp. 595-598 ◽  
Author(s):  
Jin Man Park ◽  
Yu Chan Kim ◽  
Won Tae Kim ◽  
Do Hyang Kim
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Specific Strength ◽  
High Specific Strength

Blechkomponenten aus hochfestem Aluminium*/Sheet metal components made of high-strength aluminium

2018 ◽  
Vol 108 (10) ◽  
pp. 639-645
Author(s):  
P. Groche ◽  
J. Günzel ◽  
T. Suckow
Keyword(s):  
Heat Treatment ◽  
Sheet Metal ◽  
Construction Material ◽  
High Strength ◽  
Process Chain ◽  
Lightweight Construction ◽  
Forming Process ◽  
Specific Strength ◽  
Treatment Processes ◽  
High Specific Strength

Zur Ausnutzung der hohen spezifischen Festigkeit und folglich Eignung als Leichtbauwerkstoff von EN AW-7075 bedarf es neben den Umform- auch Wärmebehandlungsprozessen, die im Folgenden in den Umformprozess integriert werden und die Prozesskette somit deutlich kürzer und effizienter gestalten. Dieser Fachbeitrag zeigt, welches Produktivitäts- und Leichtbaupotenzial durch eine Inline-Wärmebehandlung erschlossen werden kann.   To be able to exploit the high specific strength and thus suitability of EN AW-7075 as a lightweight construction material, it requires not only forming but also heat treatment processes. The latter become integrated into the forming process and thus make the process chain significantly shorter and more efficient. This paper points out the potential for productivity and lightweight construction to be tapped by inline heat treatment.

scholarly journals Failure Analysis of Biometals

Metals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 662
Author(s):  
Reza Hashemi
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Failure Analysis ◽  
High Strength ◽  
Medical Implants ◽  
Load Bearing ◽  
Metallic Biomaterials ◽  
Wear And Corrosion ◽  
Wear And Corrosion Resistance ◽  
Cardiovascular Implants

Metallic biomaterials (biometals) are widely used for the manufacture of medical implants, ranging from load-bearing orthopaedic prostheses to dental and cardiovascular implants, because of their favourable combination of properties including high strength, fracture toughness, biocompatibility, and wear and corrosion resistance [...]

scholarly journals Stearic Acid Coated MgO Nanoplate Arrays as Effective Hydrophobic Films for Improving Corrosion Resistance of Mg-Based Metallic Glasses

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 947
Author(s):  
Yonghui Yan ◽  
Xiaoli Liu ◽  
Hanqing Xiong ◽  
Jun Zhou ◽  
Hui Yu ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Stearic Acid ◽  
Metallic Glasses ◽  
High Strength ◽  
Solution Concentration ◽  
Sweep Rate ◽  
Technological Parameters ◽  
Water Contact ◽  
Cycle Number ◽  
High Elasticity

Mg-based metallic glasses (MGs) are widely studied due to their high elasticity and high strength originating from their amorphous nature. However, their further application in many potential fields is limited by poor corrosion resistance. In order to improve this property, an MgO nanoplate array layer is first constructed on the surface of Mg-based MGs by cyclic voltammetry (CV) treatments. In this situation, the corrosion resistance and hydrophilicity of the material are enhanced. Then, stearic acid (SA) can effectively adhere onto the surface of the MgO layer to form a superficial hydrophobic film with a water contact angle (WCA) of 131°. As a result, the SA coated MgO hydrophobic film improves the corrosion resistance of Mg-based MGs in 3.5 wt.% NaCl solution obviously. In addition, the effects of four technological parameters (solution concentration, sweep rate, cycle number, and reaction temperature) in the CV process on the morphology and size of nano-products are investigated in detail. The work proposes a new method for the creation of nanostructures on the surface of materials and provides a new idea to increase the corrosion resistance of MGs. The related method is expected to be applied in wider fields in future.

Mechanical behavior of laminated bamboo lumber dowel-type connection

2019 ◽  
Vol 23 (1) ◽  
pp. 65-73 ◽  
Author(s):  
Jiannan Li ◽  
Aiping Zhou
Keyword(s):  
Rectangular Cross Section ◽  
High Strength ◽  
Strength Properties ◽  
Loading Capacity ◽  
Yield Model ◽  
Specific Strength ◽  
High Specific Strength ◽  
Laminated Bamboo ◽  
Theoretical Results ◽  
Laminated Bamboo Lumber

Bamboo is a kind of green material with high specific strength, while the hollow tubular structure makes it rather hard to be utilized in structure. Glue and hot-pressing processes make laminated bamboo lumber rectangular cross section and with high strength properties. The dowel-type connection can be used in I-joist instead of the costly adhesive, while the behaviors of which are extremely complicated. European yield model is confirmed to be an effective method to estimate loading capacity of connection and is adopted by various standard and design codes. This article focused on a kind of connection innovatively with laminated bamboo lumber dowel. The embedment tests were carried out to study the embedment strength of laminated bamboo lumber members. Connection tests under lateral load were conducted to investigate the performance and loading capacity. Finally, theoretical results determined by design rules in current codes were compared with experimental results

scholarly journals Microstructure and Mechanical Properties of Rapidly Solidified β-Type Ti–Fe–Sn–Mo Alloys with High Specific Strength and Low Elastic Modulus

Metals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1135 ◽  
Author(s):  
Li ◽  
Ma ◽  
Jia ◽  
Meng ◽  
Tang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Volume Fraction ◽  
High Yield ◽  
Specific Strength ◽  
High Specific Strength ◽  
Microstructure And Mechanical Properties ◽  
Low Elastic Modulus ◽  
Mo Content ◽  
Rapidly Solidified

The microstructure and mechanical properties of rapidly solidified β-type Ti–Fe–Sn–Mo alloys with high specific strength and low elastic modulus were investigated. The results show that the phases of Ti–Fe–Sn–Mo alloys are composed of the β-Ti, α-Ti, and TiFe phases; the volume fraction of TiFe phase decreases with the increase of Mo content. The high Fe content results in the deposition of TiFe phase along the grain boundary of the Ti phase. The Ti75Fe19Sn5Mo1 alloy exhibits the high yield strength, maximum compressive strength, large plastic deformation, high specific strength, high Vickers hardness, and large toughness value, which is a superior new engineering material. The elastic modulus (42.1 GPa) of Ti75Fe15Sn5Mo5 alloy is very close to the elastic modulus of human bone (10–30 GPa), which indicating that the alloy can be used as a good biomedical alloy. In addition, the large H/Er and H3/Er2 values of Ti75Fe19Sn5Mo1 alloy indicate the good wear resistance and long service life as biomedical materials.

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