Influence of microstructure on the diamond-machinability of hot-pressed silicon carbide: A molecular dynamics study

Meng，Binbin1,2; Qiu，Pei1; Yuan，Dandan1; Xu，Shaolin1

2019-12-01

10.1016/j.ceramint.2019.07.330

CERAMICS INTERNATIONAL   影响因子和分区

0272-8842

1873-3956

The effect of microstructure on the deformation mechanism and diamond-machinability of hot-pressed SiC during grinding process is studied. Similar to single-crystal SiC, amorphization, dislocation slip motion, and lattice distortion also occurs in the deformation process of multi-phase SiC ceramics. Other deformation mechanisms related to the microstructure of SiC ceramics, such as intergranular slip motion and grain fragmentation, have decisive influence on diamond-machinability of this material. When the average grain size is lower than 10 nm, there is a significant weakening of scratch hardness. Intergranular slip motions and grain fragmentation can effectively improve the processing efficiency. Therefore, in view of fabrication technology of SiC ceramics, reducing the grain size at nanoscale can improve the diamond-machinability of hot-pressed SiC and favorable for obtaining high-efficiency and high-precision surface processing effectiveness.

Deformation Diamond-machinability Microstructure SiC ceramic

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[51705233]

Materials Science

Materials Science, Ceramics

WOS:000493217800058

ELSEVIER SCI LTD

20193107260144

Ceramic materials ; Deformation ; Diamonds ; Efficiency ; Grain size and shape ; Microstructure ; Molecular dynamics ; Single crystals ; Textures

Gems:482.2.1 ; Physical Chemistry:801.4 ; Inorganic Compounds:804.2 ; Ceramics:812.1 ; Production Engineering:913.1 ; Crystalline Solids:933.1 ; Materials Science:951

MATERIALS SCIENCE

2-s2.0-85069934434

Scopus

1.Department of Mechanical and Energy EngineeringSouthern University of Science and Technology,Shenzhen,518055,China
2.School of Power and Mechanical EngineeringWuhan University,Wuhan,430000,China

Meng，Binbin,Qiu，Pei,Yuan，Dandan,et al. Influence of microstructure on the diamond-machinability of hot-pressed silicon carbide: A molecular dynamics study[J]. CERAMICS INTERNATIONAL,2019,45(17):22872-22879.

Meng，Binbin,Qiu，Pei,Yuan，Dandan,&Xu，Shaolin.(2019).Influence of microstructure on the diamond-machinability of hot-pressed silicon carbide: A molecular dynamics study.CERAMICS INTERNATIONAL,45(17),22872-22879.

Meng，Binbin,et al."Influence of microstructure on the diamond-machinability of hot-pressed silicon carbide: A molecular dynamics study".CERAMICS INTERNATIONAL 45.17(2019):22872-22879.