Effects of the Initial Heat-Treatment Conditions on Microstructures of YbBa2Cu3O7-δSuperconducting Final Films Deposited on SrTiO3(001) Substrates by the Dipping-Pyrolysis Process

1999 ◽  
Vol 38 (Part 1, No. 9A) ◽  
pp. 5050-5053 ◽  
Author(s):  
Junko Shibata ◽  
Katsuya Yamagiwa ◽  
Izumi Hirabayashi ◽  
Xiuliang Ma ◽  
Jun Yuan ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Pyrolysis Process ◽  
Treatment Conditions ◽  
Initial Heat ◽  
Initial Heat Treatment

Preparation of YBa2Cu3O7−y films on SrTiO3 and MgO by the dipping-pyrolysis process under low-p(O2) heat treatment

1992 ◽  
Vol 7 (9) ◽  
pp. 2337-2342 ◽  
Author(s):  
T. Manabe ◽  
K. Arai ◽  
W. Kondo ◽  
S. Mizuta ◽  
T. Kumagai
Keyword(s):  
Heat Treatment ◽  
Stability Region ◽  
Pyrolysis Process ◽  
Axis Orientation ◽  
Ag Addition ◽  
Upper Limit ◽  
Treatment Conditions ◽  
Heat Treated ◽  
The Stability ◽  
Annealing Method

Superconducting YBa2Cu3O7−y (YBCO) films having a thickness of 1 μm were prepared on SrTiO3(100) and MgO(100) by the dipping-pyrolysis process using a low-p(O2) annealing method. Heat-treatment conditions were varied along the upper limit of the stability region of the YBCO phase. Films on SrTiO3(100) exhibited strong c-axis orientation with sharp rocking curves (FWHM = 0.8°). The highest Tc,zero of 87 K was obtained for the film heat-treated at 750 °C. On the other hand, films on MgO(100) showed broader rocking curves and their Tc's remained lower. Moreover, Ag addition was found to enhance the Tc values (Tc,zero = 91 K) of films on SrTiO3 heat-treated at 750 °C.

Effects of Heat Treatment Conditions on the Critical Current Densities of Ba2YCu3O7-yFilms Prepared by the Dipping-Pyrolysis Process

1990 ◽  
Vol 29 (Part 2, No. 6) ◽  
pp. L940-L942 ◽  
Author(s):  
Toshiya Kumagai ◽  
Takaaki Manabe ◽  
Wakichi Kondo ◽  
Hidehiro Minamiue ◽  
Susumu Mizuta
Keyword(s):  
Heat Treatment ◽  
Critical Current ◽  
Pyrolysis Process ◽  
Treatment Conditions ◽  
Current Densities

Degradation of Mechanical and Structural Properties of Steel T23

2007 ◽  
Vol 567-568 ◽  
pp. 389-392 ◽  
Author(s):  
Marie Svobodová ◽  
Jindřich Douda ◽  
Jiří Kudrman
Keyword(s):  
Heat Treatment ◽  
Structural Properties ◽  
High Temperatures ◽  
Base Material ◽  
Experimental Results ◽  
Air Atmosphere ◽  
Mechanical And Structural Properties ◽  
Long Time ◽  
Initial Heat ◽  
Initial Heat Treatment

This paper deals with changes in mechanical and structural properties of Steel T23 during long-time annealing at high temperatures. The research is focused on the degradation of the base material (steel T23), where the samples of steel, after the initial heat treatment, were annealed at temperatures of 600, 650 and 700 °C for 10 to 10 000 hours in a furnace with air atmosphere. This contribution summarizes the experimental results of mechanical and structural measurements and gives the relations between them.

The Effect of Heat Treatment on the Microstructure and Properties of FeAl+Cr

1996 ◽  
Vol 460 ◽  
Author(s):  
P. R. Munroe ◽  
C. H. Kong
Keyword(s):  
Heat Treatment ◽  
Growth Mechanism ◽  
Isothermal Annealing ◽  
Prolonged Annealing ◽  
Heat Treated ◽  
Ledge Growth ◽  
Initial Drop ◽  
Microstructural Studies ◽  
Initial Heat ◽  
Initial Heat Treatment

ABSTRACTMicrostructural studies were performed on an alloy of composition Fe45Cr5Al50 heat treated at 950°C and oil-quenched and then given isothermal annealing treatments for times up to 200 hours at either 400°C or 500°C. The observed microstructures were correlated with variations in hardness during isothermal annealing. It was deduced that the thermal vacancies retained following the initial heat treatment are removed relatively rapidly from the lattice, which leads to an initial drop in hardness. However, during prolonged annealing, the coarsening of bothFeAl2 particles and a disordered a(Fe,Cr) phase leads to further softening. It was also deduced that the chromium atoms, which remain in solution, are effective solute strengtheners. The a(Fe,Cr) phase, which is coherent with the B2 matrix, appears to coarsen by a ledge growth mechanism.

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