{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/121452"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/121452","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Effects of sintering on grain growth and density in trivalent cation doped zirconia","abstract":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms","abstract_html":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms","abstract_has_math":false,"creators":["Oh, Hyunkyung"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Materials Science & Engr","degree_department":null,"school":null,"contributors":["Krogstad, Jessica A"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2023,"date_issued":"2023-08","date_published":"2023-08","updated_at":"2026-07-22T22:24:57Z","subjects":["Sintering","Ysz","Microstructures"],"languages":["en","eng"],"rights":["Copyright 2023 Hyunkyung Oh"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2142/121452","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Krogstad, Jessica A"]},{"key":"dc:creator","label":"Author","values":["Oh, Hyunkyung"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2023-08","2023-07-17"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Materials Science & Engr"]},{"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":["Sintering","Ysz","Microstructures"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en","eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2023 Hyunkyung Oh"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2142/121452"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms","The student, Hyunkyung Oh, accepted the attached license on 2023-07-03 at 09:15.","The student, Hyunkyung Oh, submitted this Thesis for approval on 2023-07-03 at 09:26.","This Thesis was approved for publication on 2023-07-17 at 16:34.","DSpace SAF Submission Ingestion Package generated from Vireo submission #19502 on 2023-12-04 at 17:00:38","Yttria stabilized zirconia has been widely used in applications due to its good thermal stability and ionic conductivity. Especially, in order to have better ionic conductivity, a dense microstructure with large grain size is desirable given the typically negative effect of grain boundaries on ionic conductivity. In this work, doped zirconia samples with various dopant concentration (15mol% YO1.5, 30mol% YO1.5, 30mol% YbO1.5 and 30mol% GdO1.5) are studied. The powders were made by using the reverse co-precipitation method. Two-step sintering was used to make dense samples with large grain size and investigated how this sintering method affects grain size and density. The first sintering step was spark plasma sintering (SPS) and the second sintering step was pressureless conventional sintering (CS). The grain growth that occurred during both sintering steps was different depending on the concentration of dopant and the type of dopant due to the different surface energy and cation diffusivity. The density unexpectedly decreased between the first sintering step (SPS) and the second sintering step (CS). It is tentatively attributed to the influence of high heating rate of SPS and high sintering temperature of conventional sintering."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Effects of sintering on grain growth and density in trivalent cation doped zirconia"]}]}],"canonical_facts":{"dc:contributor":["Krogstad, Jessica A"],"dc:creator":["Oh, Hyunkyung"],"dc:date":["2023-08","2023-07-17"],"dc:description":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms","The student, Hyunkyung Oh, accepted the attached license on 2023-07-03 at 09:15.","The student, Hyunkyung Oh, submitted this Thesis for approval on 2023-07-03 at 09:26.","This Thesis was approved for publication on 2023-07-17 at 16:34.","DSpace SAF Submission Ingestion Package generated from Vireo submission #19502 on 2023-12-04 at 17:00:38","Yttria stabilized zirconia has been widely used in applications due to its good thermal stability and ionic conductivity. Especially, in order to have better ionic conductivity, a dense microstructure with large grain size is desirable given the typically negative effect of grain boundaries on ionic conductivity. In this work, doped zirconia samples with various dopant concentration (15mol% YO1.5, 30mol% YO1.5, 30mol% YbO1.5 and 30mol% GdO1.5) are studied. The powders were made by using the reverse co-precipitation method. Two-step sintering was used to make dense samples with large grain size and investigated how this sintering method affects grain size and density. The first sintering step was spark plasma sintering (SPS) and the second sintering step was pressureless conventional sintering (CS). The grain growth that occurred during both sintering steps was different depending on the concentration of dopant and the type of dopant due to the different surface energy and cation diffusivity. The density unexpectedly decreased between the first sintering step (SPS) and the second sintering step (CS). It is tentatively attributed to the influence of high heating rate of SPS and high sintering temperature of conventional sintering."],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2142/121452"],"dc:language":["en","eng"],"dc:rights":["Copyright 2023 Hyunkyung Oh"],"dc:subject":["Sintering","Ysz","Microstructures"],"dc:title":["Effects of sintering on grain growth and density in trivalent cation doped zirconia"],"dc:type":["text"],"thesis:degree_discipline":["Materials Science & Engr"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:24:57Z"}