Al-Yb Amorphous Alloys Produced by Ion Mixing or Solid State Reaction

1991 ◽  
Vol 235 ◽  
Author(s):  
B. X. Liu ◽  
J. R. Ding ◽  
D. Z. Che ◽  
H. B. Zhang
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Amorphous Alloys ◽  
Room Temperature ◽  
Composition Range ◽  
Metastable Phase ◽  
Recrystallization Behavior ◽  
Multilayered Films ◽  
The Difference ◽  
Hcp Structure

ABSTRACTWe report, in this paper, three different ways of producing amorphous alloys in the Al-Yb system, (i) Al80Yb20multilayered films were readily amorphized by 180 keV xenon ion mixing at room temperature(RT) to a dose of 3×1015 Xe/cm2. (ii) When the dose went up to 1×1016 Xe/cm2 or higher, a metastable phase of hcp structure was formed. Interestingly, the hcp phase turned into amorphous after annealing at 500°C for about 10 minutes. (iii) Amorphous alloys were also formed by steady state thermal annealing of the Al-Yb multilayered films at about 450 °C for 20 minutes. The optimum amorphization range was found out by experiments to be 17 to 30 Yb at%, i.e., within this composition range, the multilayered films could entirely be amorphized by solid state reaction.The recrystallization behavior of the amorphous alloys formed by different methods was also studied and the difference in this aspect was thought to relate to the structures resulting from different processing methods.Possible explanation of the observed sequence of phase transition is also discussed.

Amorphization of Thin Multilayer Films by Ion Mixing and Solid State Reaction

1983 ◽  
Vol 27 ◽  
Author(s):  
M. Van Rossum ◽  
U. Shreter ◽  
W. L. Johnson ◽  
M-A. Nicolet
Keyword(s):  
Solid State ◽  
Amorphous Phase ◽  
Solid State Reaction ◽  
Amorphous Alloys ◽  
Composition Range ◽  
Multilayer Films ◽  
Solid State Diffusion ◽  
State Diffusion ◽  
Thermochemical Parameters ◽  
Mixed Samples

ABSTRACTWe have compared the formation of amorphous alloys from Ni-Hf multilayer films by ion mixing and solid state diffusion. We find that ion mixing and solid state reaction produce significant differences in the composition range of the amorphous phase inside the mixed samples. Moreover, the thermochemical parameters which are of primary importance for the solid state reaction also influence the behavior of the Ni-Hf system under ion mixing.

Structure and emission properties of barium calcium aluminates synthesized by room-temperature solid-state reaction approach

2021 ◽  
Vol 263 ◽  
pp. 124418
Author(s):  
Zhenghu Huang ◽  
Fengyi Wu ◽  
Qiang Zheng ◽  
Huiyu Xiong ◽  
Jian Fang ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Room Temperature ◽  
Emission Properties ◽  
Calcium Aluminates

Preparation of High-Purity Ultrafine α-Al2O3 by Solid-State Reaction at Room Temperature

2008 ◽  
Vol 368-372 ◽  
pp. 683-685
Author(s):  
Cheng Wei Hao ◽  
Bo Lin Wu ◽  
Ji Yan Li
Keyword(s):  
Solid State ◽  
High Purity ◽  
Solid State Reaction ◽  
Room Temperature ◽  
Raw Materials ◽  
Phase Particle ◽  
Phase Transformation Temperature ◽  
Particle Size And Morphology ◽  
Size And Morphology ◽  
Α Al2o3

Ammonium aluminium carbonate hydroxide (AACH), with a small quantity of γ-AlOOH, was synthesized through solid-state reaction at room temperature using AlCl3·6H2O and NH4HCO3 as raw materials and polyethylene glycol (PEG-10000) as the dispersant. After calcined at 1100°C for 1.5h, α-Al2O3 powders with primary particle sizes of 20~30nm were obtained. The crystal phase, particle size and morphology of the high-purity ultrafine α-Al2O3 were characterized. The results showed that a small quantity of γ-AlOOH in the AACH decomposed and formed crystal seeds. The presence of crystal seeds reduced the nucleation activation energy and therefore reduced the phase transformation temperature.

Co/Mn-Coated LiNiO2 Cathode Materials by Solid-State Reaction at Room Temperature

2008 ◽  
Vol 37 (11) ◽  
pp. 1881-1886 ◽  
Author(s):  
Guorong Hu ◽  
Xinrong Deng ◽  
Zhongdong Peng ◽  
Ke Du ◽  
Yanbin Cao ◽  
...  
Keyword(s):  
Solid State ◽  
Cathode Materials ◽  
Solid State Reaction ◽  
Room Temperature

Thermal study of NiC2O4·2H2O obtained by a solid state reaction at room temperature and normal pressure

1987 ◽  
Vol 118 ◽  
pp. 123-134 ◽  
Author(s):  
M.E. García-Clavel ◽  
M.J. Martinez-Lope ◽  
M.T. Casais-Alvarez
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Room Temperature ◽  
Normal Pressure ◽  
Thermal Study

Paramagnetic Keplerate “Necklaces” Synthesized by a Novel Room-Temperature Solid-State Reaction: Controlled Linking of Metal-Oxide-Based Nanoparticles

2002 ◽  
Vol 41 (4) ◽  
pp. 579-582 ◽  
Author(s):  
Achim Müller ◽  
Samar K. Das ◽  
Marina O. Talismanova ◽  
Hartmut Bögge ◽  
Paul Kögerler ◽  
...  
Keyword(s):  
Solid State ◽  
Metal Oxide ◽  
Solid State Reaction ◽  
Room Temperature

Facile preparation of polyoxometalate nanoparticles via a solid-state chemical reaction for aerobic oxidative desulfurization catalysis

2021 ◽  
Author(s):  
Hang Yu ◽  
Wenwen Bu ◽  
Zijia Wang ◽  
Zhuoyue Zhao ◽  
Mehwish Jadoon ◽  
...  
Keyword(s):  
Solid State ◽  
Silver Nitrate ◽  
Chemical Reaction ◽  
Solid State Reaction ◽  
Room Temperature ◽  
Oxidative Desulfurization ◽  
Solid State Reaction Method ◽  
Reaction Method ◽  
State Chemical ◽  
Facile Preparation

Polyoxometalate nanoparticles were synthesized via a concise solid-state reaction method by directly grinding silver nitrate and the polyoxometalate (NH4)5H6PMo4V8O40 at room temperature without the assistance of a surfactant.

Ag 3 PO 4 Microcrystals Synthesized by Room-Temperature Solid State Reaction: Enhanced Photocatalytic Activity and Photoelectronchemistry Performance

2015 ◽  
Vol 32 (12) ◽  
pp. 128101
Author(s):  
Chen-Chun Hao ◽  
Jie Xu ◽  
Hong-Long Shi ◽  
Jun-Li Fu ◽  
Bin Zou ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Solid State ◽  
Solid State Reaction ◽  
Room Temperature
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