{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/88098"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/88098","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Characterization of electrical conductivity of carbon fiber/epoxy composites with conductive AFM and scanning microwave impedance microscopy","abstract":"This thesis investigates the electrical conductivity of IM7 carbon fibers using two Atomic Force Microscope (AFM) –based techniques: Conductive AFM (C-AFM) and Scanning Microwave Impedance Microscopy (sMIM). Unidirectional IM7/977-3 carbon fiber/epoxy laminates were manufactured and examined with these two techniques. C-AFM was used to measure the bulk resistivity of IM7 fibers at (1.9 ± 1.1) x 10-3 Ω∗cm. Given that the uncertainty of these measurements is rather large, implementation of calibration experiments is needed. sMIM experiments revealed large nano-scale spatial variations in the axial and transverse conductances of IM7 fibers. Attempts were made to quantify sMIM results through construction of experimental and computational calibration curves, but neither of these efforts was successful in yielding conductivity measurements that agreed with the measurements made with C-AFM or the manufacturer specification. Refinements to the computational methodology such as improved material property inputs and better isolation of the sMIM signal could yield promising future results for sMIM characterization of conductivity.","abstract_html":"This thesis investigates the electrical conductivity of IM7 carbon fibers using two Atomic Force Microscope (AFM) –based techniques: Conductive AFM (C-AFM) and Scanning Microwave Impedance Microscopy (sMIM). Unidirectional IM7/977-3 carbon fiber/epoxy laminates were manufactured and examined with these two techniques. C-AFM was used to measure the bulk resistivity of IM7 fibers at (1.9 ± 1.1) x 10-3 Ω∗cm. Given that the uncertainty of these measurements is rather large, implementation of calibration experiments is needed. sMIM experiments revealed large nano-scale spatial variations in the axial and transverse conductances of IM7 fibers. Attempts were made to quantify sMIM results through construction of experimental and computational calibration curves, but neither of these efforts was successful in yielding conductivity measurements that agreed with the measurements made with C-AFM or the manufacturer specification. Refinements to the computational methodology such as improved material property inputs and better isolation of the sMIM signal could yield promising future results for sMIM characterization of conductivity.","abstract_has_math":false,"creators":["McKenzie, Andrew B."],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Aerospace Engineering","degree_department":null,"school":null,"contributors":["White, Scott"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-29T20:38:46Z","date_published":"2015-09-29T20:38:46Z","updated_at":"2026-07-22T22:26:31Z","subjects":["Carbon fibers","Composites","Electrical conductivity","Atomic Force Microscopy","Conductive Atomic Force Microscopy (AFM)","Scanning Microwave Impedance Microscopy"],"languages":["en"],"rights":["Copyright 2015 Andrew McKenzie"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/88098","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["White, Scott"]},{"key":"dc:creator","label":"Author","values":["McKenzie, Andrew B."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-29T20:38:46Z","2015-08","2015-07-21","2015-8"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Aerospace Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Carbon fibers","Composites","Electrical conductivity","Atomic Force Microscopy","Conductive Atomic Force Microscopy (AFM)","Scanning Microwave Impedance Microscopy"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2015 Andrew McKenzie"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/88098"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["This thesis investigates the electrical conductivity of IM7 carbon fibers using two Atomic Force Microscope (AFM) –based techniques: Conductive AFM (C-AFM) and Scanning Microwave Impedance Microscopy (sMIM). Unidirectional IM7/977-3 carbon fiber/epoxy laminates were manufactured and examined with these two techniques. C-AFM was used to measure the bulk resistivity of IM7 fibers at (1.9 ± 1.1) x 10-3 Ω∗cm. Given that the uncertainty of these measurements is rather large, implementation of calibration experiments is needed. sMIM experiments revealed large nano-scale spatial variations in the axial and transverse conductances of IM7 fibers. Attempts were made to quantify sMIM results through construction of experimental and computational calibration curves, but neither of these efforts was successful in yielding conductivity measurements that agreed with the measurements made with C-AFM or the manufacturer specification. Refinements to the computational methodology such as improved material property inputs and better isolation of the sMIM signal could yield promising future results for sMIM characterization of conductivity.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2015-09-29 without embargo terms","The student, Andrew McKenzie, accepted the attached license on 2015-07-20 at 20:00.","The student, Andrew McKenzie, submitted this Thesis for approval on 2015-07-20 at 20:12.","This Thesis was approved for publication on 2015-07-21 at 08:17.","DSpace SAF Submission Ingestion Package generated from Vireo submission #8577 on 2015-09-29 at 13:23:24","Made available in DSpace on 2015-09-29T20:38:46Z (GMT). No. of bitstreams: 2 MCKENZIE-THESIS-2015.pdf: 5297690 bytes, checksum: 926cc9620102e552aea83319afcdb129 (MD5) LICENSE.txt: 4212 bytes, checksum: fe854a41aef89838082edc4262ad3062 (MD5) Previous issue date: 2015-07-21"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Characterization of electrical conductivity of carbon fiber/epoxy composites with conductive AFM and scanning microwave impedance microscopy"]}]}],"canonical_facts":{"dc:contributor":["White, Scott"],"dc:creator":["McKenzie, Andrew B."],"dc:date":["2015-09-29T20:38:46Z","2015-08","2015-07-21","2015-8"],"dc:description":["This thesis investigates the electrical conductivity of IM7 carbon fibers using two Atomic Force Microscope (AFM) –based techniques: Conductive AFM (C-AFM) and Scanning Microwave Impedance Microscopy (sMIM). Unidirectional IM7/977-3 carbon fiber/epoxy laminates were manufactured and examined with these two techniques. C-AFM was used to measure the bulk resistivity of IM7 fibers at (1.9 ± 1.1) x 10-3 Ω∗cm. Given that the uncertainty of these measurements is rather large, implementation of calibration experiments is needed. sMIM experiments revealed large nano-scale spatial variations in the axial and transverse conductances of IM7 fibers. Attempts were made to quantify sMIM results through construction of experimental and computational calibration curves, but neither of these efforts was successful in yielding conductivity measurements that agreed with the measurements made with C-AFM or the manufacturer specification. Refinements to the computational methodology such as improved material property inputs and better isolation of the sMIM signal could yield promising future results for sMIM characterization of conductivity.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2015-09-29 without embargo terms","The student, Andrew McKenzie, accepted the attached license on 2015-07-20 at 20:00.","The student, Andrew McKenzie, submitted this Thesis for approval on 2015-07-20 at 20:12.","This Thesis was approved for publication on 2015-07-21 at 08:17.","DSpace SAF Submission Ingestion Package generated from Vireo submission #8577 on 2015-09-29 at 13:23:24","Made available in DSpace on 2015-09-29T20:38:46Z (GMT). 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