Kinetics of densification during hot-pressing of aluminium nitride

1981 ◽  
Vol 16 (11) ◽  
pp. 3093-3098 ◽  
Author(s):  
J. -P. Lecompte ◽  
J. Jarrige ◽  
J. Mexmain ◽  
R. J. Brook ◽  
F. L. Riley
Keyword(s):  
Hot Pressing ◽  
Aluminium Nitride ◽  
Kinetics Of

Comments on ?kinetics of densification during hot-pressing of aluminium nitride?

1982 ◽  
Vol 17 (10) ◽  
pp. 3072-3074 ◽  
Author(s):  
W. H. Gourdin ◽  
L. E. Tanner
Keyword(s):  
Hot Pressing ◽  
Aluminium Nitride ◽  
Kinetics Of

scholarly journals Hot Pressing of Aluminium Nitride

1983 ◽  
pp. 293-299 ◽  
Author(s):  
J.P. Lecompte ◽  
J. Jarrige ◽  
J. Mexmain
Keyword(s):  
Hot Pressing ◽  
Aluminium Nitride

Precipitation Kinetics of Aluminium Nitride in Austenite in Microalloyed HSLA Steels

2010 ◽  
Vol 636-637 ◽  
pp. 605-611 ◽  
Author(s):  
Rene Radis ◽  
Ernst Kozeschnik
Keyword(s):  
Grain Boundaries ◽  
Short Circuit ◽  
Bulk Diffusion ◽  
Aluminium Nitride ◽  
Precipitation Kinetics ◽  
Hsla Steels ◽  
Nitride Formation ◽  
Simulated Precipitation ◽  
Kinetics Of ◽  
Spherical Diffusion

In this work, the thermodynamic information on aluminium nitride formation and experimental precipitation kinetics data are reviewed. A revised expression for the Gibbs energy of AlN is developed with special emphasis on microalloyed steel. Using the software package MatCalc, computer simulations of AlN precipitation kinetics are performed and compared to several independent experimental results from literature. To mimic the geometrical arrangement of AlN precipitates along austenite grain boundaries, a new model for precipitation at grain boundaries is used, which takes into account fast short-circuit diffusion along grain boundaries as well as the slower bulk diffusion of atoms from inside the grain to the grain boundaries. This is essential for the calculation of AlN precipitation in austenite where nucleation occurs predominantly on grain boundaries. By studying the AlN precipitation at grain boundaries numerically, and by comparison with experimental data, it is demonstrated that the precipitation kinetics of AlN differs significantly from the simulated precipitation kinetics of randomly distributed precipitates assuming spherical diffusion fields.

Densification kinetics of sandwich-type reinforced materials in hot pressing

1972 ◽  
Vol 11 (1) ◽  
pp. 22-27
Author(s):  
D. M. Karpinos ◽  
L. I. Tuchinskii ◽  
V. Ya. Fefer
Keyword(s):  
Hot Pressing ◽  
Sandwich Type ◽  
Kinetics Of ◽  
Reinforced Materials

Densification kinetics of boron carbide in hot pressing

1987 ◽  
Vol 26 (11) ◽  
pp. 881-884 ◽  
Author(s):  
M. S. Koval'chenko ◽  
Yu. G. Tkachenko ◽  
L. F. Ochkas ◽  
D. Z. Yurchenko ◽  
V. B. Vinokurov
Keyword(s):  
Boron Carbide ◽  
Hot Pressing ◽  
Kinetics Of

The effect of MgO additions on the kinetics of hot pressing in Al2O3

1980 ◽  
Vol 15 (12) ◽  
pp. 3017-3024 ◽  
Author(s):  
M. P. Harmer ◽  
R. J. Brook
Keyword(s):  
Hot Pressing ◽  
Kinetics Of

Densification kinetics of?-AlB12 and Al3B48C2 powders during hot pressing

1996 ◽  
Vol 35 (1-2) ◽  
pp. 25-31 ◽  
Author(s):  
A. I. Kharlamov ◽  
N. V. Kirillova ◽  
S. V. Loichenko
Keyword(s):  
Hot Pressing ◽  
Kinetics Of

Cure kinetics of PF/PVAc hybrid adhesive for manufacturing profiled wood-strand composites

Holzforschung ◽  
2010 ◽  
Vol 64 (5) ◽  
Author(s):  
Yi Wang ◽  
Vikram Yadama ◽  
Marie-Pierre Laborie ◽  
Debes Bhattacharyya
Keyword(s):  
Hot Pressing ◽  
Phenol Formaldehyde ◽  
Cure Kinetics ◽  
Roll Forming ◽  
Good Prediction ◽  
Forming Process ◽  
Scanning Calorimetry ◽  
Cross Sectional ◽  
Kinetics Of ◽  
Wood Strand

Abstract In thermoforming of profiled wood-strand composites, an adhesive system is needed to provide a weak initial bond to maintain mat integrity and architecture during the forming process and eventually a durable bond when the final cross-sectional shape is achieved. A hybrid adhesive composed of phenol formaldehyde (PF) and poly(vinyl acetate) (PVAc) is proposed in this study. The cure kinetics of this hybrid adhesive and bond development in a multi-step hot-pressing is discussed. Cure kinetics studied by differential scanning calorimetry indicated that adding PVAc slowed down the curing reaction of PF resin; however, the full cure of PF was not inhibited. The nth-order Borchardt Daniels (nth-BD) model provided good prediction for the curing of adhesives with a PF/PVAc ratio lower than 1:1. To simulate roll forming of wood-strand mats, a hot-pressing schedule at low temperature combined with multi-stage closing and opening was developed. The nth-BD model was able to predict the actual bond development for composites made with neat PF resin. The results indicated that cure kinetics of a PF/PVAc hybrid adhesive would not significantly differ from neat PF resin for blend ratios of 1:1 or lower, thus potentially providing a resin system for roll forming or matched-die forming of wood-strand composites.

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