Comparative Study of Indentation Size Effects in As-Sintered Alumina and Alumina Shock Deformed at 6.5 and 12 GPa
Joint Authors
Mandal, Ashok K.
Gupta, Satish C.
Bysakh, Sandip
Rav, Amit
Chakraborty, Riya
Biswas, Sampad K.
Mukhopadhyay, Anoop Kumar
Joshi, Keshaw D.
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-12-05
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Nanohardness of alumina ceramics determines its performance in all contact-related applications because the issue of structural integrity gets determined at the nanoscale of contact.
In spite of the wealth of the literature, however, it is not yet known in significant details how the high-strain rate flyer-plate impact at different pressure affects the nanohardness of dense, coarse grain alumina ceramics.
Thus, the load controlled nanoindentation experiments were performed with a Berkovich indenter on an as-received coarse grain (~10 μm), high density (~3.98 gm·cc−1) alumina, and shock recovered tiny fragments of the same alumina obtained from gas gun experiments conducted at 6.5 GPa and 12 GPa shock pressures with stainless steel flyer plates.
The nanohardness of the as-received alumina was much higher than that of the 6.5 GPa and 12 GPa shock-recovered alumina.
The indentation size effect (ISE) was the strongest in alumina shocked at 12 GPa and strong in alumina shocked at 6.5 GPa, but it was mild in the as-received alumina sample.
These results were rationalized by analysis of the experimental load depth data and evidences obtained from field emission scanning electron microscopy.
In addition, a rational picture of the nanoindentation responses of the as-received and shocked alumina ceramics was provided by a qualitative model.
American Psychological Association (APA)
Chakraborty, Riya& Mukhopadhyay, Anoop Kumar& Joshi, Keshaw D.& Rav, Amit& Mandal, Ashok K.& Bysakh, Sandip…[et al.]. 2012. Comparative Study of Indentation Size Effects in As-Sintered Alumina and Alumina Shock Deformed at 6.5 and 12 GPa. ISRN Ceramics،Vol. 2012, no. 2012, pp.1-11.
https://search.emarefa.net/detail/BIM-483694
Modern Language Association (MLA)
Chakraborty, Riya…[et al.]. Comparative Study of Indentation Size Effects in As-Sintered Alumina and Alumina Shock Deformed at 6.5 and 12 GPa. ISRN Ceramics No. 2012 (2012), pp.1-11.
https://search.emarefa.net/detail/BIM-483694
American Medical Association (AMA)
Chakraborty, Riya& Mukhopadhyay, Anoop Kumar& Joshi, Keshaw D.& Rav, Amit& Mandal, Ashok K.& Bysakh, Sandip…[et al.]. Comparative Study of Indentation Size Effects in As-Sintered Alumina and Alumina Shock Deformed at 6.5 and 12 GPa. ISRN Ceramics. 2012. Vol. 2012, no. 2012, pp.1-11.
https://search.emarefa.net/detail/BIM-483694
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-483694