alexa Hardness Of The Fe81Ga19/Si(100) Film Measured By The Nanoindentation Method
ISSN: 2157-7439

Journal of Nanomedicine & Nanotechnology
Open Access

Like us on:
OMICS International organises 3000+ Global Conferenceseries Events every year across USA, Europe & Asia with support from 1000 more scientific Societies and Publishes 700+ Open Access Journals which contains over 50000 eminent personalities, reputed scientists as editorial board members.

Open Access Journals gaining more Readers and Citations

700 Journals and 15,000,000 Readers Each Journal is getting 25,000+ Readers

This Readership is 10 times more when compared to other Subscription Journals (Source: Google Analytics)

3rd International Conference on Nanotek & Expo
December 02-04, 2013 Hampton Inn Tropicana, Las Vegas, NV, USA

Shien-Uang Jen
ScientificTracks Abstracts: J Nanomed Nanotechnol
DOI: 10.4172/2157-7439.S1.013
Abstract
Fe81Ga19 alloy is an auxetic material, which means that its Poisson?s ratio along the [110] direction, V [110] , is negative. When this alloy is deposited on a single-crystal Si(100) wafer, the film is highly (110) textured. Thus, if we indent the film plane with a Berkovich indenter vertically, the apparent hardness obtained with the parameter V ef f = V [110] =-0.55 < 0 should be larger than that with V eff = V [110] =+0.30. This is reasonable, because if V eff is negative, the deformed material under the pressing indenter tends to push the tip slightly upward (or backward). As a result, the measured depth of circle of contact, hp, of this auxetic film is smaller than it should be under a fixed force, F, and, moreover, since the hardness H ≡ F/[24.5(hp)2], the apparent (measured) hardness must be larger. We have made a series of (Fe100-xCox) 81 Ga 19 /Si(100) films, and measured their hardness. The results indicate that: [1] when 0≤x<7 at %Co, the films (or alloys) are auxetic ( V eff <0); [2] when 7≤x≤11 at %Co, they are critical (V eff =0); and [3] when 11 0). Each point on the loading or un-loading curve was analyzed by the finite element analysis to show the side-view of the shear-stress (τ) distributions in the film, film/substrate, and substrate regions, respectively. We can study (or outline) the plastic-flow zone beneath the indenter by adopting the Tresca criterion: τ ≥ H/6
Biography
Shien-Uang Jen has completed his Ph.D. at the age of 29 from the Physics Department of Carnegie-Mellon University. He is now a senior research fellow of the Institute of Physics, Academia Sinica. He has published more than 123 papers in reputed journals.
image PDF   |   image HTML
 
Peer Reviewed Journals
 
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
 
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

Agri & Aquaculture Journals

Dr. Krish

[email protected]

1-702-714-7001Extn: 9040

Biochemistry Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Business & Management Journals

Ronald

[email protected]

1-702-714-7001Extn: 9042

Chemistry Journals

Gabriel Shaw

[email protected]

1-702-714-7001Extn: 9040

Clinical Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Engineering Journals

James Franklin

[email protected]

1-702-714-7001Extn: 9042

Food & Nutrition Journals

Katie Wilson

[email protected]

1-702-714-7001Extn: 9042

General Science

Andrea Jason

[email protected]

1-702-714-7001Extn: 9043

Genetics & Molecular Biology Journals

Anna Melissa

[email protected]

1-702-714-7001Extn: 9006

Immunology & Microbiology Journals

David Gorantl

[email protected]om

1-702-714-7001Extn: 9014

Materials Science Journals

Rachle Green

[email protected]

1-702-714-7001Extn: 9039

Nursing & Health Care Journals

Stephanie Skinner

[email protected]

1-702-714-7001Extn: 9039

Medical Journals

Nimmi Anna

[email protected]

1-702-714-7001Extn: 9038

Neuroscience & Psychology Journals

Nathan T

[email protected]

1-702-714-7001Extn: 9041

Pharmaceutical Sciences Journals

Ann Jose

[email protected]

1-702-714-7001Extn: 9007

Social & Political Science Journals

Steve Harry

[email protected]

1-702-714-7001Extn: 9042

 
© 2008- 2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version