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.

Amorphous phase formation in Ti/Ni bilayer thin films by solid-state diffusion

1989 ◽  
Vol 8 (12) ◽  
pp. 1393-1394 ◽  
Author(s):  
Masahiro Kitada ◽  
Noboru Shimizu ◽  
Teruho Shimotsu
Keyword(s):  
Thin Films ◽  
Solid State ◽  
Amorphous Phase ◽  
Phase Formation ◽  
Solid State Diffusion ◽  
State Diffusion ◽  
Amorphous Phase Formation

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.

Enhanced solid-state reaction kinetics of shock-compressed titanium and carbon powder mixtures

1998 ◽  
Vol 13 (11) ◽  
pp. 3160-3173 ◽  
Author(s):  
Jong-Heon Lee ◽  
Naresh N. Thadhani
Keyword(s):  
Solid State ◽  
Reaction Kinetics ◽  
Shock Compression ◽  
Solid State Reaction ◽  
Chemical Reactivity ◽  
Carbon Powder ◽  
Solid State Diffusion ◽  
Powder Mixtures ◽  
State Diffusion ◽  
Solid State Reaction Kinetics

The effect of shock compression on the solid-state chemical reactivity of titanium and carbon powder mixtures was investigated with the objective of forming net-shaped TiC ceramics with a fine-grain microstructure. The combination of defect states and intimate interparticle contacts introduced during shock compression results in significant enhancement of the otherwise sluggish solid-state diffusion of Ti and C through the TiCx boundary layer. The apparent activation energy for TiCx formation was determined using solid-state reaction kinetics models, and was found to be reduced by four-to-six times that of diffusion of Ti into TiCx and two-to-three times that of diffusion of C in TiCx. As a result, net-shaped sections of shock-densified compacts (˜85% dense) were reaction synthesized via solid-state diffusion, producing microstructures with grain size <6 μm and microhardness of ˜2000 kg/mm2, in contrast to statically pressed powder compacts which reacted by a combustion process resulting in a highly porous product.

Formation of AlCuFe quasicrystalline thin films by solid state diffusion

1994 ◽  
Vol 64 (4) ◽  
pp. 431-433 ◽  
Author(s):  
T. Klein ◽  
O. G. Symko
Keyword(s):  
Thin Films ◽  
Solid State ◽  
Solid State Diffusion ◽  
State Diffusion

Joining of Ti3SiC2 with Ti–6Al–4V Alloy

2002 ◽  
Vol 17 (1) ◽  
pp. 52-59 ◽  
Author(s):  
N.F. Gao ◽  
Y. Miyamoto
Keyword(s):  
Solid State ◽  
Rate Constant ◽  
Liquid State ◽  
Parabolic Rate Constant ◽  
Diffusion Path ◽  
Solid State Diffusion ◽  
Diffusion Controlled ◽  
State Diffusion ◽  
Rate Controlled ◽  
Higher Temperature

The joining of a Ti3SiC2 ceramic with a Ti–6Al–4V alloy was carried out at the temperature range of 1200–1400 °C for 15 min to 4 h in a vacuum. The total diffusion path of joining was determined to be Ti3SiC2/Ti5Si3Cx/Ti5Si3Cx + TiCx/TiCx/Ti. The reaction was rate controlled by the solid-state diffusion below 1350 °C and turned to the liquid-state diffusion controlled with a dramatic increase of parabolic rate constant Kp when the temperature exceeded 1350 °C. The TiCx tended to grow at the boundarywith the Ti–6Al–4V alloy at a higher temperature and longer holding time. TheTi3SiC2/Ti–6Al–4V joint is expected to be applied to implant materials.

Investigation of the diffusion behavior in Sn-xAg-yCu/Cu solid state diffusion couples

2016 ◽  
Vol 686 ◽  
pp. 794-802 ◽  
Author(s):  
Yuan Yuan ◽  
Dajian Li ◽  
Yuanyuan Guan ◽  
Hans J. Seifert ◽  
Nele Moelans
Keyword(s):  
Solid State ◽  
Solid State Diffusion ◽  
Diffusion Couples ◽  
Diffusion Behavior ◽  
State Diffusion
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