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Effect of grain boundary sliding on fracture toughness of ceramic/graphene composites. / Sheinerman, A. G.; Morozov, N. F.; Gutkin, M. Yu.
в: Mechanics of Materials, Том 137, 103126, 01.10.2019.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Effect of grain boundary sliding on fracture toughness of ceramic/graphene composites
AU - Sheinerman, A. G.
AU - Morozov, N. F.
AU - Gutkin, M. Yu.
PY - 2019/10/1
Y1 - 2019/10/1
N2 - A model is suggested describing the effect of grain boundary (GB) sliding on the fracture toughness of ceramic/graphene composites. Within the model, GB sliding near the tip of a large mode I crack initiates the formation of a new nano- or microcrack at an adjacent GB. The new crack merges with the pre-existent one, thus providing crack propagation. For the situation where the suggested crack growth mechanism restricts the fracture toughness of ceramic/graphene composites, we calculated the dependence of the fracture toughness on grain size and lateral dimensions of graphene platelets. The calculations demonstrated that GB-sliding-assisted crack growth reduces fracture toughness, and the effect is strongest for the case where grain size is small and the lateral graphene platelet dimensions are close to the sizes of GBs. The results of the calculations agree with the experimental data on the fracture toughness of alumina/graphene composites.
AB - A model is suggested describing the effect of grain boundary (GB) sliding on the fracture toughness of ceramic/graphene composites. Within the model, GB sliding near the tip of a large mode I crack initiates the formation of a new nano- or microcrack at an adjacent GB. The new crack merges with the pre-existent one, thus providing crack propagation. For the situation where the suggested crack growth mechanism restricts the fracture toughness of ceramic/graphene composites, we calculated the dependence of the fracture toughness on grain size and lateral dimensions of graphene platelets. The calculations demonstrated that GB-sliding-assisted crack growth reduces fracture toughness, and the effect is strongest for the case where grain size is small and the lateral graphene platelet dimensions are close to the sizes of GBs. The results of the calculations agree with the experimental data on the fracture toughness of alumina/graphene composites.
KW - Ceramics
KW - Fracture toughness
KW - Grain boundary sliding
KW - Graphene
KW - REDUCED GRAPHENE OXIDE
KW - ZIRCONIA COMPOSITES
KW - CARBON NANOTUBE
KW - STRENGTH
KW - MECHANICAL-PROPERTIES
KW - CRACKS
KW - GROWTH
KW - GENERATION
KW - MICROSTRUCTURE
KW - CERAMICS
UR - http://www.scopus.com/inward/record.url?scp=85069839997&partnerID=8YFLogxK
U2 - 10.1016/j.mechmat.2019.103126
DO - 10.1016/j.mechmat.2019.103126
M3 - Article
AN - SCOPUS:85069839997
VL - 137
JO - Mechanics of Materials
JF - Mechanics of Materials
SN - 0167-6636
M1 - 103126
ER -
ID: 44960155