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20151206125804.0 |
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m fo d |
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cr unu|||||||| |
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150210s2015 txu obm 000 0 eng d |
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|a (OCoLC)ocn903162862
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|a (TxCM)http://hdl.handle.net/1969.1/152621
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|a TXA
|b eng
|e rda
|e pn
|c TXA
|d UtOrBLW
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|a TXAM
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|a 2014
|a Dissertation
|a 1969.1/152621
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|a Liu, Yue,
|e author.
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|a Strengthening Mechanisms of Sputtered Copper, Cobalt and Their Nanocomposites /
|c by Yue Liu.
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|a [College Station, Texas] :
|b [Texas A & M University],
|c [2015]
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|a 1 online resource.
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|a text
|b txt
|2 rdacontent
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|a computer
|b c
|2 rdamedia
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|a online resource
|b cr
|2 rdacarrier
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|a text file
|b PDF
|2 rda
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|a "Major Subject: Materials Science and Engineering"
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|a Includes vita.
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|b Doctor of Philosophy
|c Texas A & M University
|d 2014
|o http://hdl.handle.net/1969.1/152621
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|a Includes bibliographical references.
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|a Text (Dissertation)
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|a Low energy planar defects such as twin boundaries have been employed to strengthen materials effectively with insignificant loss of the conductivity and ductility. High density growth twins can be formed in low stacking fault energy (SFE) metals, such as copper (Cu) and silver (Ag). However, low SFE metal cobalt (Co) received little attention due to the complex coexistence of hexagonal close-packed (HCP) and face-centered cubic (FCC) structure. The focus of this research is to identify the strengthening mechanisms of planar defects such as twin boundaries, stacking faults, and layer interfaces in epitaxial FCC/HCP Co, and Cu/Co multilayers. Our studies show that epitaxial Cu/Co multilayers with different texture have drastic different mechanical properties, dictated by the transmission of partial vs. full dislocations across layer interfaces. Furthermore the mechanical properties of epitaxial Co are dominated by high density stacking faults. Moreover, by applying advanced nanoindentation techniques, such as thermal-drift corrected strain-rate sensitivity measurement, the mechanical properties including strain-rate sensitivity is accurately determined. By using in situ nanoindentation under transmission electron microscope (TEM), we determined deformation physics of nanotwinned Cu, including detwinning, dislocation-twin interactions and work hardening. This project provides an important new perspective to investigate mechanical behavior of nanostructured metals with high density stacking faults. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/152621
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|a Description from author supplied metadata (automated record created 2015-01-09 15:05:15).
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|a Major Materials Science and Engineering.
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|a Nanoindentation
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|a Transmission electron microscopy
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|a Magnetron sputtering
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|a Thin film
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|a X-ray diffraction
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|a Zhang, Xinghang,
|e thesis advisor.
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|a Texas A & M University,
|e degree granting institution.
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|u http://hdl.handle.net/1969.1/152621
|z Link to OAK Trust copy
|t 0
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| 994 |
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|a C0
|b TXA
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| 948 |
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|a cataloged
|b h
|c 2015/2/10
|d o
|e coplinger
|f 1:50:14 pm
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|a MARS
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|s 7795a8ef-bdc9-3632-b867-cc84ec20c03a
|i 41095ccf-69c0-3b3d-b1ab-cbdfe9924541
|t 0
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| 952 |
f |
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|a Texas A&M University
|b College Station
|c Electronic Resources
|d Available Online
|t 0
|e 2014 Dissertation 1969.1/152621
|h Other scheme
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| 998 |
f |
f |
|a 2014 Dissertation 1969.1/152621
|t 0
|l Available Online
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