Programme

P.12 -- Poster, VCTP-45

Date: Tuesday, 13 October 2020

Time: 08:30 - 10:00

Structural and mechanical properties in densified (AlN)0.85(Si3N4)0.15 ceramics: A molecular dynamics simulation study

Nguyen Thi Thao (1), Dinh Thi Hinh (2), Nguyen Manh Hung (3), Nguyen Ba Phuong (4), Le Van Vinh (2)

(1) Hanoi National University of Education, (2) Phenikaa University, Hanoi, Vietnam, (3) Thuyloi University, (4) Institute of Materials Science

Molecular dynamics simulations have been carried out to investigate the microstructures and mechanical properties of densified (AlN)0.85(Si3N4)0.15 ceramics under uniaxial deformation. The samples with different densities were cooled down from 5000 K to 300 K. At the temperature of 300 K, these samples contain the poly-crystalline AlN embedded by the amorphous Si3N4. The poly-crystalline AlN contains major fcc-AlN and minor hcp-AlN. At the low density of sample, the amorphous Si3N4 contains major SiN3 units, but it contains major SiN4 units with the high density. The strengthening enhancement of the samples is observed with increasing density.

Presenter: Le Van Vinh