{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/22759"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/22759","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Radiation damage in nickel(3) aluminum","abstract":"The ordered intermetallic Ni$\\sb3$Al was used in two series of experiments that were designed to elucidate both fundamental and practical aspects of radiation damage. The first is a Transmission Electron Microscopy investigation of cascade damage under heavy ion irradiation; the second is a radiation induced segregation study. For the first topic, the cascade generated damage structure (namely, disordered zones and dislocation loops) were examined as a function of ion mass (Ar$\\sp+$, Kr$\\sp+$, Xe$\\sp+$), ion energy (30 and 50 keV), and irradiation temperature (30, 300, 350 and 400K). At room temperature and at constant ion energy, the average size of the disordered zones increases with increasing ion mass. At room temperature and at constant ion mass, the zone size increases with increasing energy; but only for the heavier Xe+ ions. At 30K, for the same ion mass and ion energy, the size of the disordered zones was smaller than at room temperature. When the irradiation temperature was increased to 400K, the disordered zone size was also found to be smaller than that obtained from the room temperature irradiations. The zones were found to increase in size with increasing ion mass, similar to the trend observed with the room temperature irradiation.","abstract_html":"The ordered intermetallic Ni$\\sb3$Al was used in two series of experiments that were designed to elucidate both fundamental and practical aspects of radiation damage. The first is a Transmission Electron Microscopy investigation of cascade damage under heavy ion irradiation; the second is a radiation induced segregation study. For the first topic, the cascade generated damage structure (namely, disordered zones and dislocation loops) were examined as a function of ion mass (Ar$\\sp+$, Kr$\\sp+$, Xe$\\sp+$), ion energy (30 and 50 keV), and irradiation temperature (30, 300, 350 and 400K). At room temperature and at constant ion energy, the average size of the disordered zones increases with increasing ion mass. At room temperature and at constant ion mass, the zone size increases with increasing energy; but only for the heavier Xe+ ions. At 30K, for the same ion mass and ion energy, the size of the disordered zones was smaller than at room temperature. When the irradiation temperature was increased to 400K, the disordered zone size was also found to be smaller than that obtained from the room temperature irradiations. The zones were found to increase in size with increasing ion mass, similar to the trend observed with the room temperature irradiation.","abstract_has_math":true,"creators":["Bui, Tho Xuan"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Materials Science and Engineering","degree_department":null,"school":null,"contributors":["Robertson, Ian M."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-05-07T13:50:31Z","date_published":"2011-05-07T13:50:31Z","updated_at":"2026-07-22T22:25:20Z","subjects":["Physics, Condensed Matter","Engineering, Metallurgy","Engineering, Materials Science"],"languages":["eng"],"rights":["Copyright 1995 Bui, Tho Xuan"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9543543","(UMI)AAI9543543"],"render_values":[{"text":"AAI9543543","href":null,"code":true},{"text":"(UMI)AAI9543543","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/22759","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Robertson, Ian M."]},{"key":"dc:creator","label":"Author","values":["Bui, Tho Xuan"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-05-07T13:50:31Z","10000-01-01","1995"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Materials Science and Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"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":["Physics, Condensed Matter","Engineering, Metallurgy","Engineering, Materials Science"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 1995 Bui, Tho Xuan"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9543543","(UMI)AAI9543543","http://hdl.handle.net/2142/22759"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The ordered intermetallic Ni$\\sb3$Al was used in two series of experiments that were designed to elucidate both fundamental and practical aspects of radiation damage. The first is a Transmission Electron Microscopy investigation of cascade damage under heavy ion irradiation; the second is a radiation induced segregation study. For the first topic, the cascade generated damage structure (namely, disordered zones and dislocation loops) were examined as a function of ion mass (Ar$\\sp+$, Kr$\\sp+$, Xe$\\sp+$), ion energy (30 and 50 keV), and irradiation temperature (30, 300, 350 and 400K). At room temperature and at constant ion energy, the average size of the disordered zones increases with increasing ion mass. At room temperature and at constant ion mass, the zone size increases with increasing energy; but only for the heavier Xe+ ions. At 30K, for the same ion mass and ion energy, the size of the disordered zones was smaller than at room temperature. When the irradiation temperature was increased to 400K, the disordered zone size was also found to be smaller than that obtained from the room temperature irradiations. The zones were found to increase in size with increasing ion mass, similar to the trend observed with the room temperature irradiation.","For all irradiation temperatures, the dislocation loop yield shows the same trends as the disordered zone size: the yield increases with increasing energy and increasing ion mass. The loop yield is also lower for irradiations at 30K and 400K than at 300K and 350K. It was found that while there is a correlation between the size of the disordered zones, larger disordered zones did not necessarily produce larger dislocation loops. An interpretation of these results in terms of current computer modeling for the formation of disordered zones and dislocation loops will be presented.","Surface segregation studies using Auger electron spectroscopy were performed in order to investigate the effects of Radiation Induced Segregation (RIS) on Ni$\\sb3$Al. The results showed that Ni$\\sb3$Al has a strong resistance to RIS. TEM analysis of the microstructure under irradiation suggests that the resistance to segregation is due to a dense and stable dislocation network that exists within the irradiated region throughout the temperature range at which RIS is expected to occur. This dislocation network competes against the surface as a point defect sink, preventing the long-range migration of point defects that is necessary for RIS to occur. The nature of the dislocation network suggests a strong influence of ordering energy on the stability of the dislocations.","Made available in DSpace on 2011-05-07T13:50:31Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9543543.pdf: 5170669 bytes, checksum: cc14dfa94aef81ed00bfe60fb8d1646e (MD5) Previous issue date: 1995","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:59:48Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:28:15-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"]},{"key":"dc:title","label":"Title","values":["Radiation damage in nickel(3) aluminum"]}]}],"canonical_facts":{"dc:contributor":["Robertson, Ian M."],"dc:creator":["Bui, Tho Xuan"],"dc:date":["2011-05-07T13:50:31Z","10000-01-01","1995"],"dc:description":["The ordered intermetallic Ni$\\sb3$Al was used in two series of experiments that were designed to elucidate both fundamental and practical aspects of radiation damage. The first is a Transmission Electron Microscopy investigation of cascade damage under heavy ion irradiation; the second is a radiation induced segregation study. For the first topic, the cascade generated damage structure (namely, disordered zones and dislocation loops) were examined as a function of ion mass (Ar$\\sp+$, Kr$\\sp+$, Xe$\\sp+$), ion energy (30 and 50 keV), and irradiation temperature (30, 300, 350 and 400K). At room temperature and at constant ion energy, the average size of the disordered zones increases with increasing ion mass. At room temperature and at constant ion mass, the zone size increases with increasing energy; but only for the heavier Xe+ ions. At 30K, for the same ion mass and ion energy, the size of the disordered zones was smaller than at room temperature. When the irradiation temperature was increased to 400K, the disordered zone size was also found to be smaller than that obtained from the room temperature irradiations. The zones were found to increase in size with increasing ion mass, similar to the trend observed with the room temperature irradiation.","For all irradiation temperatures, the dislocation loop yield shows the same trends as the disordered zone size: the yield increases with increasing energy and increasing ion mass. The loop yield is also lower for irradiations at 30K and 400K than at 300K and 350K. It was found that while there is a correlation between the size of the disordered zones, larger disordered zones did not necessarily produce larger dislocation loops. An interpretation of these results in terms of current computer modeling for the formation of disordered zones and dislocation loops will be presented.","Surface segregation studies using Auger electron spectroscopy were performed in order to investigate the effects of Radiation Induced Segregation (RIS) on Ni$\\sb3$Al. The results showed that Ni$\\sb3$Al has a strong resistance to RIS. TEM analysis of the microstructure under irradiation suggests that the resistance to segregation is due to a dense and stable dislocation network that exists within the irradiated region throughout the temperature range at which RIS is expected to occur. This dislocation network competes against the surface as a point defect sink, preventing the long-range migration of point defects that is necessary for RIS to occur. The nature of the dislocation network suggests a strong influence of ordering energy on the stability of the dislocations.","Made available in DSpace on 2011-05-07T13:50:31Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9543543.pdf: 5170669 bytes, checksum: cc14dfa94aef81ed00bfe60fb8d1646e (MD5) Previous issue date: 1995","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:59:48Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:28:15-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"],"dc:identifier":["AAI9543543","(UMI)AAI9543543","http://hdl.handle.net/2142/22759"],"dc:language":["eng"],"dc:rights":["Copyright 1995 Bui, Tho Xuan"],"dc:subject":["Physics, Condensed Matter","Engineering, Metallurgy","Engineering, Materials Science"],"dc:title":["Radiation damage in nickel(3) aluminum"],"dc:type":["text"],"thesis:degree_discipline":["Materials Science and Engineering"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:20Z"}