Anisotropy of microhardness and resistance to cracking for crystals of the langasite family

The microhardness of single crystals of the La 3 Ga 5 SiO 14 , La 3 Ta 0.5 Ga 5.5 O 14 , Ca 3 TaGa 3 Si 2 O 14 family of lantanum-gallium silicates of trigonal symmetry class 32 of space group P 321 is studied using the Knupp approach. The anisotropy of grade I microhardness (the polar dependence of...

Full description

Saved in:
Bibliographic Details
Published in:Bulletin of the Russian Academy of Sciences. Physics 2014-11, Vol.78 (11), p.1188-1196
Main Authors: Kugaenko, O. M., Torshina, E. S., Buzanov, O. A., Sakharov, S. A.
Format: Article
Language:English
Subjects:
Alloys
Anisotropy
Cracking (fracturing)
Crystallography
Fracture mechanics
Gallium
Hadrons
Heavy Ions
Microhardness
Nuclear Physics
Physics
Physics and Astronomy
Planes
Position measurement
Proceedings of the International Symposium “Physics of Crystals 2013”
Quality
Silicates
Single crystals
Stress intensity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The microhardness of single crystals of the La 3 Ga 5 SiO 14 , La 3 Ta 0.5 Ga 5.5 O 14 , Ca 3 TaGa 3 Si 2 O 14 family of lantanum-gallium silicates of trigonal symmetry class 32 of space group P 321 is studied using the Knupp approach. The anisotropy of grade I microhardness (the polar dependence of microhardness on an indentor’s position relative to the crystallographic directions in the plane of measurement) is revealed in crystallographic planes , , (0001). The anisotropy of cracking resistance is revealed by measuring the stress intensity of crystals, allowing us to determine the direction and plane of a fracture in single crystals of the langasite family.
ISSN:1062-8738
1934-9432
DOI:10.3103/S106287381411015X