Abstract

In this paper, nanoindentation tests of GGG single crystal are performed on an Agilent G200 nanoindenter. The surface morphology and subsurface deformation mechanism induced by the nanoindentation are analyzed by a scanning electron microscope and a transmission electron microscope (TEM), respectively. The ductile deformation mechanism of GGG single crystal induced by the nanoindentation is a combination of “polycrystalline nanocrystallites” and “amorphous transformation.” In addition, the relationships between the normal force and elastic recovery, microhardness, elastic modulus, and fracture toughness of GGG single crystal are researched. Due to the size effect caused by the tip radius of the indenter, the elastic recovery rate and fracture toughness decrease first and then tend to be stable as the normal force increases, while the microhardness and elastic modulus increase first and then decrease to be stable as the normal force increases. The stress–strain curve of GGG single crystal is developed by using the nanoindentation test with a spherical indenter. When GGG single crystal deforms from the elastic regime into the ductile regime, the original single crystal is changed into “polycrystalline nanocrystallites” and “amorphous transformation” structures verified by TEM. Therefore, the material strength decreases, which results in a discontinuity of the stress–strain curve for GGG single crystal.

© 2018 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Surface deformation and friction characteristic of nano scratch at ductile-removal regime for optical glass BK7

Chen Li, Feihu Zhang, Ye Ding, and Lifei Liu
Appl. Opt. 55(24) 6547-6553 (2016)

Loose abrasive lapping hardness of optical glasses and its interpretation

John C. Lambropoulos, Su Xu, and Tong Fang
Appl. Opt. 36(7) 1501-1516 (1997)

Surface microroughness of optical glasses under deterministic microgrinding

John C. Lambropoulos, Tong Fang, Paul D. Funkenbusch, Stephen D. Jacobs, Michael J. Cumbo, and Donald Golini
Appl. Opt. 35(22) 4448-4462 (1996)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (13)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (13)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription