Production of Zirconium-Based Glassy Alloy Wires by Melt Extraction Method and Their Mechanical Properties

1998 ◽  
Vol 554 ◽  
Author(s):  
A. Katsuya ◽  
A. Inoue
Keyword(s):  
Mechanical Properties ◽  
Transition Temperature ◽  
Cross Section ◽  
Extraction Method ◽  
Glassy Alloy ◽  
Circular Cross Section ◽  
Supercooled Liquid ◽  
Melt Extraction ◽  
Melt Spun ◽  
Melt Extraction Method

AbstractGlassy Zr65Al10Ni10Cu15 wires were produced in the diameter range up to about 310 µm by a melt extraction method using a copper wheel in an argon atomospher The grass transition temperature (Tg) and crystallization temperature (Tx) are 652K and 757K, respectively, and the temperature interval of the supercooled liquid, ΔTx(=Tx-Tg) is 105K, in agreement with those for the corresponding melt-spun ribbon. The wires have a nearly real circular cross section and good mechanical properties.

scholarly journals Separation of Niobium and Tantalum by “Melt-Extraction Method”

1953 ◽  
Vol 74 (5) ◽  
pp. 383-385
Author(s):  
Kozo Nagashima ◽  
Shizuo Fujiwara
Keyword(s):  
Extraction Method ◽  
Melt Extraction ◽  
Melt Extraction Method

scholarly journals Fabrication of Beta-Ti-Type Ti-Nb-Ta-Zr (TNTZ) Wire with High-Ductility by Arc-Melt-Type Melt-Extraction Method

2010 ◽  
Vol 51 (2) ◽  
pp. 377-380
Author(s):  
Takeshi Nagase ◽  
Takayoshi Nakano ◽  
Yukichi Umakoshi ◽  
Mitsuo Niinomi
Keyword(s):  
Extraction Method ◽  
High Ductility ◽  
Melt Extraction ◽  
Melt Extraction Method

INJECTION MOLDING OF FLAT GLASS FIBER REINFORCED THERMOPLASTICS

2010 ◽  
Vol 24 (15n16) ◽  
pp. 2555-2560 ◽  
Author(s):  
KAZUTO TANAKA ◽  
TSUTAO KATAYAMA ◽  
TATSUYA TANAKA ◽  
AKIHIRO ANGURI
Keyword(s):  
Mechanical Properties ◽  
Injection Molding ◽  
Glass Fiber ◽  
Cross Section ◽  
Fiber Length ◽  
Flat Glass ◽  
Circular Cross Section ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
Fiber Attrition

During an injection molding of composite materials, fiber attrition occurs and the average fiber length is reduced. In order to control the breakage of fibers and degradation of mechanical properties during processing, Flat glass Fiber (FF), that has oval cross-section shape, has been developed to use for glass fiber reinforced thermoplastic (GFRTP). Using FF as reinforcement of GFRTP has advantages as following: (1) Fluidity of FF is better than conventional Normal glass Fiber (NF) with 'circular' cross-section; (2) Fiber breakage during the injection molding process using FF is smaller than that using NF. In this study, the mechanical properties of FF and NF were compared for reinforcement of long fiber thermoplastics pellets (LFT pellets). We have also investigated the effect of screw design on fiber damage and the mechanical properties. The mechanical properties of specimens molded by FF reinforcement LFT (FF-LFT) pellets were superior to these of NF reinforcement LFT (NF-LFT) pellets. The former could give composites with higher fluidity and longer residual fiber length. Moreover, FF was able to strengthen injection-molded samples with higher fiber content than NF. Low shear type screw was effective to prevent the fiber attrition during plasticization process, hence leads to better mechanical properties of GFRTP

High glass-forming ability and good mechanical properties of new bulk glassy alloys in Cu–Zr–Ag ternary system

2006 ◽  
Vol 21 (1) ◽  
pp. 234-241 ◽  
Author(s):  
W. Zhang ◽  
A. Inoue
Keyword(s):  
Mechanical Properties ◽  
Ternary System ◽  
Glassy Alloy ◽  
Alloy System ◽  
Supercooled Liquid ◽  
Glass Forming Ability ◽  
Liquid Region ◽  
Glass Forming ◽  
Glassy Alloys ◽  
Wide Range

The addition of Ag to Cu–Zr alloys is very effective for the increase in the stability of supercooled liquid as well as the glass-forming ability (GFA). The large supercooled liquid region (ΔTx) exceeding 60 K in Cu–Zr–Ag ternary system was obtained in a wide range of 25–55 at.% Cu, 40–65 at.% Zr, and 5–25 at.% Ag. The best GFA was obtained around Cu45Zr45Ag10, and glassy alloy rods with diameters up to 6.0 mm were formed by copper mold casting. The bulk glassy alloys exhibit good mechanical properties, i.e., compressive fracture strength of 1780–1940 MPa, Young's modulus of 106–112 GPa, compressive plastic elongation of 0.2–2.9%, and Vickers hardness of 534–599. The finding of the new Cu–Zr–Ag ternary glassy alloy system with high GFA and good mechanical properties is important for development and scientific studies of bulk glassy alloys.

Preparation of Zr-based Metallic Glass Wire for Biomedical Application

2007 ◽  
Vol 1048 ◽  
Author(s):  
Takeshi Nagase ◽  
Koichi Kinoshita ◽  
Yukichi Umakoshi
Keyword(s):  
Tensile Strength ◽  
Metallic Glass ◽  
Extraction Method ◽  
Biomedical Application ◽  
High Thermal Stability ◽  
High Tensile Strength ◽  
Melt Extraction ◽  
Arc Melting ◽  
Co Alloys ◽  
Melt Extraction Method

AbstractNew Zr based metallic glass wires without bio-toxic elements of Ni, Al and Be were devel-oped for the further application as biomaterials by arc-melting type melt-extraction method. The continuous metallic glass wires with a good white luster and smooth surface were obtained in Zr-Ti-Al-Co, Zr-Al-Co-Cu, Zr-Al-Co and Zr-Ti-Co alloys. The Zr-based metallic glass wires show high tensile strength reaching 1000MPa. Furthermore, the wires exhibit good bending duc-tility and can be bent through 180 degrees without fracture. The Zr-based metallic glass wires achieve simultaneously high tensile strength, good bending ductility and high thermal stability.

Solid-state synthesis of new glassy Co65Ti20W15 alloy powders and subsequent densification into a fully dense bulk glass

2005 ◽  
Vol 20 (10) ◽  
pp. 2845-2853 ◽  
Author(s):  
M. Sherif El-Eskandarany ◽  
M. Omori ◽  
A. Inoue
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Glassy Alloy ◽  
Supercooled Liquid ◽  
High Energy ◽  
Supercooled Liquid Region ◽  
Exothermic Peak ◽  
Liquid Region ◽  
Plasma Sintering

The mechanical alloying method was used to synthesize a single glassy phase of Co65Ti20W15 alloy powders, using a high-energy ball mill. The glass transition temperature of the end-product, which was obtained after 173 ks of milling time, lies at 786 K, whereas the crystallization takes place at 878 K through a single sharp exothermic peak with an enthalpy change of crystallization of −4.37 kJ/mol. The reduced glass transition temperature was found to be 0.51. This glassy alloy powders exhibit a very large supercooled liquid region (92 K) for a ternary metallic system. The spark plasma sintering method was used to consolidate the glassy powders under an argon gas atmosphere at 843 K with a pressure of 19.6–38.2 MPa. The sample that was consolidated within 180 s maintains its chemically homogeneous glassy structure with a relative density of above 99.6%. Neither the supercooled liquid region nor crystallization temperature was affected by such a rapid consolidation procedure. Thus, the thermal stability of the bulk glassy sample is almost identical with the original glassy powders. The Vickers microhardness of the bulk glassy Co65Ti20W15 reveals high values, ranging between 8.69 and 8.83 GPa. The fabricated bulk glassy alloy shows high compressive strength of 2.44 GPa with a Young’s modulus of 176.81 GPa. Neither yielding stress, nor plastic strain could be detected for this glassy alloy, which its elastic strain is 1.33%.

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