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. %.

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.

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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