@Article{icces.2023.09455,
AUTHOR = {Dangqiang Wang, Hai Mei},
TITLE = {The Effect of Heating Rate on Sintering Mechanism of Alumina  Nanoparticles},
JOURNAL = {The International Conference on Computational \& Experimental Engineering and Sciences},
VOLUME = {27},
YEAR = {2023},
NUMBER = {1},
PAGES = {1--1},
URL = {http://www.techscience.com/icces/v27n1/54093},
ISSN = {1933-2815},
ABSTRACT = {The densification process of sintered alumina is mainly controlled by surface, lattice, and interface diffusion, 
and many experimental researches show that heating rate can affect the transfer of matter. Thus, to further 
reveal the effect of heating rate on sintering mechanism of alumina nanoparticle, molecular dynamic 
simulations were performed at five different heating rates to examine the migration of atoms and evolution 
of microstructure in heating stage. Results show that the sintering process of heating is a typical thermal 
activation process. High displacement response temperature is caused by high heating rate, which results in 
the mechanism of atomic migration quickly changing from surface diffusion to overlapping of surface, 
interface, and lattice diffusion. Nonuniform microstructure and asymmetrical sintered neck forms due to 
unstable and nonuniform mass transfer. Sintered neck with small radius of curvature leads to high shrinkage 
rate and large driving force. The sintering mechanism is expected to be helpful for understanding or 
developing new fast sintering methods for ceramics.},
DOI = {10.32604/icces.2023.09455}
}