Preventing sintering of nanoclusters on graphene by radical adsorption

Nanoscale ◽  
2017 ◽  
Vol 9 (36) ◽  
pp. 13618-13629 ◽  
Author(s):  
A. J. Martínez-Galera ◽  
U. A. Schröder ◽  
C. Herbig ◽  
M. A. Arman ◽  
J. Knudsen ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Transition Metals ◽  
Radical Adsorption ◽  
Thermal Stability Of

The thermal stability of monodisperse transition metals nanoparticles on graphene is improved by exposure to radicals.

Thermal Stability of Rapidly Solidified Alloys of Aluminium with Transition Metals

2006 ◽  
Vol 519-521 ◽  
pp. 389-394 ◽  
Author(s):  
Dalibor Vojtěch ◽  
Jan Verner ◽  
Barbora Bártová ◽  
Karel Saksl
Keyword(s):  
Thermal Stability ◽  
Transition Metals ◽  
Solid Solutions ◽  
Melt Spinning ◽  
Structural Features ◽  
High Thermal Stability ◽  
Crystalline Phases ◽  
Supersaturated Solid Solutions ◽  
Rapidly Solidified ◽  
Thermal Stability Of

Rapidly solidified (RS) Al-TM (TM = transition metal) alloys are perspective materials from scientific, as well as technological point of view. Generally, they are produced by the melt atomization or by the melt spinning. Subsequent compaction is commonly performed by the hot extrusion. Since transition metals, such as Cr, Fe, Ni, Zr, Ti, Mn and others, have low diffusion coefficients in solid aluminium (lower by several orders of magnitude than those of common alloying elements like Cu, Si, Mg, Zn etc.) the RS Al-TM alloys are characterized by a high thermal stability. In this paper, several RS Al-TM (TM = Cr, Fe, Ti, Mn, Ni) alloys prepared by the melt spinning and melt atomization are compared to commercially available 2xxx, 6xxx and 7xxx wrought alloys. The main structural features of both RS and wrought alloys are described. The RS alloys are characterized by the presence of micro and nano-scale crystalline and/or quasi-crystalline phases and supersaturated solid solutions. The elevated-temperature behaviour is compared for both groups of materials. The thermal stability of the investigated materials is determined by room temperature hardness measurements after various annealing regimes and a high thermal stability of the RS alloys is demonstrated. The microstructural changes and phase transformations occurring in the investigated materials upon heating are described. In the Al-TM alloys, very slow decomposition of the supersaturated solid solutions, precipitation and decomposition of the metastable quasi-crystalline phases occur.

scholarly journals Synthesis of Fe75Si20-xB5Mx (M=Ti, Ta or Zr) Powders by Wet Mechanical Milling

2015 ◽  
Vol 13 ◽  
pp. 54-58
Author(s):  
Horea Florin Chicinaş ◽  
Bogdan Viorel Neamţu ◽  
Traian Florin Marinca ◽  
Ionel Chicinaş
Keyword(s):  
Thermal Stability ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Transition Metals ◽  
Mechanical Alloying ◽  
Crystallization Temperature ◽  
Mechanical Milling ◽  
Thermal Stability Of

Amorphous Fe75Si20-xB5Mxpowders with M= Ti, Ta or Zr andx= 0 and 5 were synthesized by wet mechanical alloying, using benzene as a surfactant. The thermal stability of the Fe-Si-B alloy increases by introducing transition metals. The replacement of 5% Si with Ti, Ta or Zr leads to an increase of the crystallization temperature. It was found that the replacement of 5% Si with Zr increases the crystallization temperature with 115 °C, and also reveals a glass transition temperature around 580 °C.

scholarly journals Thermal Stability of Medium- and High-Entropy Alloys of 3d-Transition Metals

2021 ◽  
Author(s):  
A. Fourmont ◽  
A. S. Rogachev ◽  
S. Le Gallet ◽  
O. Politano ◽  
D. Yu. Kovalev ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Transition Metals ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Thermal Stability Of

scholarly journals THERMAL STABILITY OF REACTIONS OF TRANSITION METALS WITH GaAa

1992 ◽  
Vol 41 (9) ◽  
pp. 1482
Author(s):  
ZHAO YUE-CHAO ◽  
XIAN DING-CHANG
Keyword(s):  
Thermal Stability ◽  
Transition Metals ◽  
Thermal Stability Of
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