X.G.Zhou
,
X.M.Zhao
,
Y.B.Xu
,
D.Wu
金属学报(英文版)
On the basis of phase transformation kinetics, the transformation of γ→α,P,B have been investigated through considering the effect of deformation. The calculation methods of volume fraction have also been given. Comparing with common method, the simulated results are in more agreement with experiment results.
关键词:
transformation kinetics
,
null
,
null
X.M.Zhao
,
D.Wu
,
L.Z.Zhang
,
Z.Y.Liu
金属学报(英文版)
Microalloying elements in high-strength low-alloy steels, such as Nb, Ti and V, precipitate during hot-rolling processes. On the basis of classical theory of nucleation and growth, quantitative modeling of isothermal precipitation was developed, which was tested by the stress relaxation method, the calculated precipitation-time-temperature curve is in good agreements with the measured results, then the model was applied to predict the precipitation behavior during continuous cooling.
关键词:
isothermal precipitation
,
null
,
null
T.Yu
,
D.S.Wang
,
D.Wu
金属学报(英文版)
The hysteresis loop changes of ferroelecric SrBi2 Ta2 O9 (SBT) thin films (330nm) vsthe temperature of forming gas (5%o hydrogen+95%o nitrogen) annealing were measuredwhen the annealing time was 1min and 10min. The selected annealing temperaturewas at 100℃, 200℃, 250℃, 300℃, 350℃, 400℃ and 4S0℃, respectively. Our resultsshowed that the ferroelectric properties were easily destroyed and the leakage currentchanged abruptly when the SBT thin films were in their ferroelectric phase (＜270℃).The space charges at the grain boundary may take an important role in absorptionpolarity molecular hydrogen when the SBT thin films were in the ferroelectric phase.The oxygen recovery experiments were also performed and investigated in this work.
关键词:
ferroelectric
,
null
,
null
,
null
