Characterization of mechanical properties and failure of potassium dihydrogen phosphate under mechanical stressing

Yang，Shengyao1; Zhang，Liangchi2,3

2021

10.1016/j.ceramint.2021.02.162

CERAMICS INTERNATIONAL   影响因子和分区

0272-8842

1873-3956

Potassium dihydrogen phosphate (KDP) is an important material to a range of technological fields owing to its unique optical and physical properties, such as its frequency-doubling, high efficiency in nonlinear conversion and excellent photoelectric and piezoelectric capabilities. However, the basic mechanical constants of this material have never been accurately determined, and its failure mechanisms, too, have not been properly revealed. This paper aims to determine precisely the complete set of mechanical constants of KDP and investigate its failure mechanisms when the material is subjected to a variety of loading conditions. It was identified that the 6 independent mechanical constants C, C, C, C, C and C of KDP are 50.36, 50.67, −4.08, 12.58, 9.99 and 2.84 GPa, respectively; its Poisson's ratio ν is 0.24, its bulk modulus K and shear modulus G are 21.17 and 13.27 GPa, respectively; and its elastic moduli in the <100> and <001> directions, E and E, are 46.14 and 43.83 GPa, respectively. It was found that the atomic structure of KDP greatly influences its anisotropy and leads to distinguished failure mechanisms in different lattice orientations. A perfect KDP crystal fails under the stress of 3.19 GPa at the strain of 10% in the <100>/<010> direction and 1.69 GPa at the strain of 5% in the <001> direction. It was also found that the deformation of KDP under a uniaxial or a biaxial strain is due to the rotation of the tetrahedron PO groups.

Failure mechanism MD simulation Mechanical constants Mechanical stressing Potassium dihydrogen phosphate

SCI ; EI

英语

通讯

Chinese Guangdong Specific Discipline Project[2020ZDZX2006]

Materials Science

Materials Science, Ceramics

WOS:000640977400005

ELSEVIER SCI LTD

20210910010746

Crystal atomic structure ; Elastic moduli ; Frequency doublers ; Mechanisms ; Optical frequency conversion ; Potassium compounds

Mechanisms:601.3 ; Electronic Circuits Other Than Amplifiers, Oscillators, Modulators, Limiters, Discriminators or Mixers:713.5 ; Nonlinear Optics:741.1.1 ; Atomic and Molecular Physics:931.3 ; Materials Science:951

MATERIALS SCIENCE

2-s2.0-85101707869

Scopus

1.Laboratory for Precision and Nano Processing Technologies,School of Mechanical and Manufacturing Engineering,The University of New South Wales,Sydney,2052,Australia
2.Shenzhen Key Laboratory of Cross-scale Manufacturing Mechanics,Southern University of Science and Technology,Shenzhen,518055,China
3.Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Yang，Shengyao,Zhang，Liangchi. Characterization of mechanical properties and failure of potassium dihydrogen phosphate under mechanical stressing[J]. CERAMICS INTERNATIONAL,2021,47(11):15875-15882.

Yang，Shengyao,&Zhang，Liangchi.(2021).Characterization of mechanical properties and failure of potassium dihydrogen phosphate under mechanical stressing.CERAMICS INTERNATIONAL,47(11),15875-15882.

Yang，Shengyao,et al."Characterization of mechanical properties and failure of potassium dihydrogen phosphate under mechanical stressing".CERAMICS INTERNATIONAL 47.11(2021):15875-15882.