Thermal Stability and Mechanical Properties of Hydrogenated Zr-Ni-Nb-Co Amorphous Alloy

2005 ◽  
Vol 486-487 ◽  
pp. 497-500 ◽  
Author(s):  
S. Jayalakshmi ◽  
Eric Fleury ◽  
Yu Chan Kim ◽  
Ki Bae Kim
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Amorphous Alloy ◽  
Fracture Strength ◽  
Amorphous Alloys ◽  
Electrochemical Method ◽  
Amorphous Ribbons ◽  
Charging Time ◽  
Thermal Stability Of ◽  
A Current

Zr50Ni27Nb18Co5 amorphous ribbons were hydrogenated using an electrochemical method. Under a current density of 30 mA/cm2, the thermal stability of the amorphous phase was found to increase with the charging time. Hardness and fracture strength were found to be independent of charging time, indicating that the Zr-Ni-Nb-Co amorphous alloys preserved its mechanical integrity.

Influence of Phosphorus on the Calorimetric, Magnetic and Mechanical Properties of Amorphous Fe78 Si9B13 Alloys

1986 ◽  
Vol 80 ◽  
Author(s):  
P. Rudkowski ◽  
J. O. Strom-Olsen ◽  
R. Schulz ◽  
R. Roberge
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Amorphous Alloy ◽  
Phosphorus Concentration ◽  
Glassy Alloys ◽  
Optimum Stability ◽  
Saturation Induction ◽  
Soft Ferromagnetic ◽  
Field Annealing ◽  
Thermal Stability Of

AbstractThe effects of adding small amounts of phosphorus to amorphous Fe78Si9B13 alloys have been investigated. Substituting boron atoms by phosphorus improves the thermal stability of the glassy alloys. The optimum stability is reached at about 1.2 at. % phosphorus concentration. With respect to the soft ferromagnetic properties, the saturation induction increases rapidly with increasing phosphorus concentration, reaches a maximum around 0.1–0.2 at. % and then decreases upon further addition. The highest induction value was achieved with 0.1 at. % phosphorus after field annealing for 2 hours around 633K. The mechanical strength of the amorphous alloy is greatly reduced for phosphorus concentrations larger than 0.4 at. %.

Influence of Constant Magnetic Field on Mechanical Properties and Thermal Stability of the Amorphous Alloys Based on Co, Fe and Ni

2020 ◽  
Vol 12 (3) ◽  
pp. 03026-1-03026-4
Author(s):  
T. L. Tsaregradskaya ◽  
◽  
A. M. Kuryliuk ◽  
I. V. Ovsiienko ◽  
G. V. Saenko ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Mechanical Properties ◽  
Thermal Stability ◽  
Constant Magnetic Field ◽  
Amorphous Alloys ◽  
Thermal Stability Of

scholarly journals Influence of Al addition on the thermal stability and mechanical properties of Fe76.5-xCu1Si13.5b9Alx amorphous alloys

2012 ◽  
Vol 48 (1) ◽  
pp. 45-51 ◽  
Author(s):  
Y.Y. Sun ◽  
M. Song
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Amorphous Alloys ◽  
Melt Spinning ◽  
The Other ◽  
Al Content ◽  
Amorphous Ribbons ◽  
Other Hand ◽  
Al Addition

This paper fabricated Fe76.5-xCu1Si13.5B9Alx (x=0,1,2,3,5,7 at.%) amorphous ribbons using singleroller melt-spinning method. The effect of Al content on the thermal stability and mechanical properties was investigated. The results indicated that Al addition have little effect on the amorphous formation ability of the alloys. On the other hand, increasing the Al content can substantially increase Tx2, which corresponds to the crystallization of Fe borides. Nanoindentation tests indicated that hardness of the alloys increase slightly with increasing the Al content, and Young?s modulus has a complicated relationship with the Al content.

Effects of Cu and Zr on the Formation and Thermal Stability of Al–Ni–Zr–Cu–Y Amorphous Alloy

2012 ◽  
Vol 271-272 ◽  
pp. 36-41
Author(s):  
Wei Yuan Yu ◽  
Wen Jiang Lu ◽  
Nai Rui Li
Keyword(s):  
Thermal Stability ◽  
Amorphous Alloy ◽  
Amorphous Alloys ◽  
Melt Spinning ◽  
Glass Forming Ability ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Glass Forming ◽  
Spinning Process ◽  
Thermal Stability Of

Al85Ni10Zr3Y2 and Al80Ni10Zr8-xCuxY2（x=1,2,3,5） alloy ribbons had been prepared by single roller melt-spinning process under vacuum conditions. The ribbons were investigated by X–ray diffraction and differential scanning calorimetry (DSC). The results revealed the strong effect of content of Cu、Zr elements on the glass forming ability and the thermal stability of the alloys. The formation of amorphous alloys are sensitive to contens of these two elements. The completely amorphous alloy or the primary amorphous phase alloy can be obtained when the content of Cu or Zr reach an optimization, otherwise only gaining crystal phase. Al80Ni10Zr7Cu1Y2 and Al80Ni10Zr3Cu5Y2 alloys possess the excellent glass forming ability, which can form the completely amorphous alloy or the composite material of the partial crystal in remaining amorphous.

Mechanical Properties and Thermal Stability of Yttria-Doped Tetragonal Zirconia Polycrystals with Diffused Ceria in the Surface

1986 ◽  
Vol 78 ◽  
Author(s):  
T. Sato ◽  
S. Ohtaki ◽  
T. Fukushima ◽  
T. Endo ◽  
M. Shimada
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Phase Transformation ◽  
Fracture Strength ◽  
Monoclinic Phase ◽  
Bending Strength ◽  
Tetragonal Zirconia ◽  
The Body ◽  
Surface Alloying ◽  
Thermal Stability Of

ABSTRACTYttria-doped tetragonal zirconia polycrystals (Y-TZP) containing 2 and 3 mol% of Y2O3 uniformly alloyed by 0-15 mol% of CeO2 or diffusing CeO2 on the surface were fabricated, and the mechanical properties and thermal stability of the sintered bodies were evaluated by annealing in humidity conditions at 50–600° C. The tetragonal-to-monoclinic phase transformation proceeded at 100–500°C in air, and accompanied microcracks. The phase transformation proceeded rapidly on the surface, but slowly inside the body. The bending strength of the annealed specimens depended on the depth of the transformation layer thickness, but not on the degree of the phase transformation on the surface. Alloying CeO2 was useful to improve the thermal stability of Y-TZP, but noticeably decreased the fracture strength. Diffusing CeO2 on the suface of Y-TZP seemed to be useful to improve the thermal stability without loss of the fracture strength.

scholarly journals Controlling the Thermal Stability of Kyanite-Based Refractory Geopolymers

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2903
Author(s):  
Juvenal Giogetti Nemaleu Deutou ◽  
Rodrigue Cyriaque Kaze ◽  
Elie Kamseu ◽  
Vincenzo M. Sglavo
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
High Strength ◽  
Treatment Temperature ◽  
Strength Development ◽  
Particle Sizes ◽  
Cold Setting ◽  
Thermal Stability Of ◽  
Geopolymer Composites ◽  
Refractory Composites

The present project investigated the thermal stability of cold-setting refractory composites under high-temperature cycles. The proposed route dealt with the feasibility of using fillers with different particle sizes and studying their influence on the thermo-mechanical properties of refractory geopolymer composites. The volumetric shrinkage was studied with respect to particle sizes of fillers (80, 200 and 500 µm), treatment temperature (1050–1250 °C) and amount of fillers (70–85 wt.%). The results, combined with thermal analysis, indicated the efficiency of refractory-based kyanite aggregates for enhancing thermo-mechanical properties. At low temperatures, larger amounts of kyanite aggregates promoted mechanical strength development. Flexural strengths of 45, 42 and 40 MPa were obtained for geopolymer samples, respectively, at 1200 °C, made with filler particles sieved at 80, 200 and 500 µm. In addition, a sintering temperature equal to 1200 °C appeared beneficial for the promotion of densification as well as bonding between kyanite aggregates and the matrix, contributing to the reinforcement of the refractory geopolymer composites without any sign of vitrification. From the obtained properties of thermal stability, good densification and high strength, kyanite aggregates are efficient and promising candidates for the production of environmentally friendly, castable refractory composites.

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