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Study on burgers vector of dislocations in KDP (010) faces and screw dislocation growth mechanism of (101) faces

We modified the conventional etching-optical method to measure dislocation direction in a KDP crystal. As burgers vector of dislocation in the KDP crystal must match the minimum periodic vector of the crystal lattice, we suggest that dislocations with a burgers vector of [101], [102] and [103] exist...

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Autores principales: Yu, Bo, Xu, Longyun, Wang, Shenglai, Huang, Pingping, Liu, Hui, Zhang, Liyuan, Li, Xianglin, Wang, Bo, Yu, Guangwei, Sui, Tingting
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8695064/
https://www.ncbi.nlm.nih.gov/pubmed/35423307
http://dx.doi.org/10.1039/d0ra08968k
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author Yu, Bo
Xu, Longyun
Wang, Shenglai
Huang, Pingping
Liu, Hui
Zhang, Liyuan
Li, Xianglin
Wang, Bo
Yu, Guangwei
Sui, Tingting
author_facet Yu, Bo
Xu, Longyun
Wang, Shenglai
Huang, Pingping
Liu, Hui
Zhang, Liyuan
Li, Xianglin
Wang, Bo
Yu, Guangwei
Sui, Tingting
author_sort Yu, Bo
collection PubMed
description We modified the conventional etching-optical method to measure dislocation direction in a KDP crystal. As burgers vector of dislocation in the KDP crystal must match the minimum periodic vector of the crystal lattice, we suggest that dislocations with a burgers vector of [101], [102] and [103] exist. Atomic force microscopy was employed to characterize the morphology of growth spirals on the hillock of (101) faces. Multi-spirals consisting of more than two element steps with a height of 0.5 nm which is equal to (101) face interplanar distances were observed. We propose the multi-spiral structure is determined by the burgers vector of the corresponding dislocation, and constructed a geometric model of the crystal with screw dislocation to derive the relationship. Growth spirals on the (101) face present a particular triangular morphology and we proved that the triangle structure is formed by connected steps in the 1/2[111] and [010] direction. Micropipes form when the magnitude of the dislocation's burgers vector exceeds 1 nm, as predicted by BCF theory. Interaction between dislocations was observed also.
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spelling pubmed-86950642022-04-13 Study on burgers vector of dislocations in KDP (010) faces and screw dislocation growth mechanism of (101) faces Yu, Bo Xu, Longyun Wang, Shenglai Huang, Pingping Liu, Hui Zhang, Liyuan Li, Xianglin Wang, Bo Yu, Guangwei Sui, Tingting RSC Adv Chemistry We modified the conventional etching-optical method to measure dislocation direction in a KDP crystal. As burgers vector of dislocation in the KDP crystal must match the minimum periodic vector of the crystal lattice, we suggest that dislocations with a burgers vector of [101], [102] and [103] exist. Atomic force microscopy was employed to characterize the morphology of growth spirals on the hillock of (101) faces. Multi-spirals consisting of more than two element steps with a height of 0.5 nm which is equal to (101) face interplanar distances were observed. We propose the multi-spiral structure is determined by the burgers vector of the corresponding dislocation, and constructed a geometric model of the crystal with screw dislocation to derive the relationship. Growth spirals on the (101) face present a particular triangular morphology and we proved that the triangle structure is formed by connected steps in the 1/2[111] and [010] direction. Micropipes form when the magnitude of the dislocation's burgers vector exceeds 1 nm, as predicted by BCF theory. Interaction between dislocations was observed also. The Royal Society of Chemistry 2021-02-18 /pmc/articles/PMC8695064/ /pubmed/35423307 http://dx.doi.org/10.1039/d0ra08968k Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Yu, Bo
Xu, Longyun
Wang, Shenglai
Huang, Pingping
Liu, Hui
Zhang, Liyuan
Li, Xianglin
Wang, Bo
Yu, Guangwei
Sui, Tingting
Study on burgers vector of dislocations in KDP (010) faces and screw dislocation growth mechanism of (101) faces
title Study on burgers vector of dislocations in KDP (010) faces and screw dislocation growth mechanism of (101) faces
title_full Study on burgers vector of dislocations in KDP (010) faces and screw dislocation growth mechanism of (101) faces
title_fullStr Study on burgers vector of dislocations in KDP (010) faces and screw dislocation growth mechanism of (101) faces
title_full_unstemmed Study on burgers vector of dislocations in KDP (010) faces and screw dislocation growth mechanism of (101) faces
title_short Study on burgers vector of dislocations in KDP (010) faces and screw dislocation growth mechanism of (101) faces
title_sort study on burgers vector of dislocations in kdp (010) faces and screw dislocation growth mechanism of (101) faces
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8695064/
https://www.ncbi.nlm.nih.gov/pubmed/35423307
http://dx.doi.org/10.1039/d0ra08968k
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