{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/71806"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/71806","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"X-Ray and Neutron Scattering Studies of Niobium-Hydrogen Alloys Near the Alpha-Prime to Beta Phase Transition","abstract":"An experimental study of NbD(,x)(H(,x)) alloys (0.70 < x < 0.85) in the vicinity of the (alpha)'-(beta) phase transition was conducted using x-ray and elastic neutron scattering techniques in the temperature range 300 < T < 473 K. Diffuse scattering close to the Bragg peaks of the BCC (alpha)' phase was measured. The temperature dependence of the scattering was determined in the (alpha)' phase and the changes in the diffuse scattering were determined upon cooling through the (alpha)'-(beta) phase transition.","abstract_html":"An experimental study of NbD(,x)(H(,x)) alloys (0.70 < x < 0.85) in the vicinity of the (alpha)'-(beta) phase transition was conducted using x-ray and elastic neutron scattering techniques in the temperature range 300 < T < 473 K. Diffuse scattering close to the Bragg peaks of the BCC (alpha)' phase was measured. The temperature dependence of the scattering was determined in the (alpha)' phase and the changes in the diffuse scattering were determined upon cooling through the (alpha)'-(beta) phase transition.","abstract_has_math":false,"creators":["Chasnov, Robert"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Metallurgical Engineering","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-12-16T20:51:53Z","date_published":"2014-12-16T20:51:53Z","updated_at":"2026-07-22T22:26:05Z","subjects":["Engineering, Materials Science"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(UMI)AAI8409889"],"render_values":[{"text":"(UMI)AAI8409889","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/71806","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Chasnov, Robert"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-12-16T20:51:53Z","10000-01-01","1983"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Metallurgical 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":["Engineering, Materials Science"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/71806","(UMI)AAI8409889"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["An experimental study of NbD(,x)(H(,x)) alloys (0.70 < x < 0.85) in the vicinity of the (alpha)'-(beta) phase transition was conducted using x-ray and elastic neutron scattering techniques in the temperature range 300 < T < 473 K. Diffuse scattering close to the Bragg peaks of the BCC (alpha)' phase was measured. The temperature dependence of the scattering was determined in the (alpha)' phase and the changes in the diffuse scattering were determined upon cooling through the (alpha)'-(beta) phase transition.","Calculations of the diffuse scattering were carried out using the distortion field around the hydrogen solutes and taking correlations between the interstitial solutes into account. Our interpretation of the diffuse scattering data leads to a qualitative picture of the interactions between the hydrogen interstitial atoms and the niobium host lattice atoms.","We have also observed "superlattice" reflections between the Bragg peaks of the BCC (alpha)' phase, resulting from static displacements of the niobium lattice. These have been interpreted as being due to the partial ordering of deuterium atoms on octahedral interstitial sites. Because these reflections were not observed for Nb-H alloys in this composition range, an interpretation based on D-D interactions is presented.","Made available in DSpace on 2014-12-16T20:51:53Z (GMT). No. of bitstreams: 1 8409889.pdf: 3679487 bytes, checksum: 5cb465723e92595b781f5be82b4ae995 (MD5) Previous issue date: 1983","Embargo set by: Seth Robbins for item 71972 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","180 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1983."]},{"key":"dc:title","label":"Title","values":["X-Ray and Neutron Scattering Studies of Niobium-Hydrogen Alloys Near the Alpha-Prime to Beta Phase Transition"]}]}],"canonical_facts":{"dc:creator":["Chasnov, Robert"],"dc:date":["2014-12-16T20:51:53Z","10000-01-01","1983"],"dc:description":["An experimental study of NbD(,x)(H(,x)) alloys (0.70 < x < 0.85) in the vicinity of the (alpha)'-(beta) phase transition was conducted using x-ray and elastic neutron scattering techniques in the temperature range 300 < T < 473 K. Diffuse scattering close to the Bragg peaks of the BCC (alpha)' phase was measured. The temperature dependence of the scattering was determined in the (alpha)' phase and the changes in the diffuse scattering were determined upon cooling through the (alpha)'-(beta) phase transition.","Calculations of the diffuse scattering were carried out using the distortion field around the hydrogen solutes and taking correlations between the interstitial solutes into account. Our interpretation of the diffuse scattering data leads to a qualitative picture of the interactions between the hydrogen interstitial atoms and the niobium host lattice atoms.","We have also observed "superlattice" reflections between the Bragg peaks of the BCC (alpha)' phase, resulting from static displacements of the niobium lattice. These have been interpreted as being due to the partial ordering of deuterium atoms on octahedral interstitial sites. Because these reflections were not observed for Nb-H alloys in this composition range, an interpretation based on D-D interactions is presented.","Made available in DSpace on 2014-12-16T20:51:53Z (GMT). No. of bitstreams: 1 8409889.pdf: 3679487 bytes, checksum: 5cb465723e92595b781f5be82b4ae995 (MD5) Previous issue date: 1983","Embargo set by: Seth Robbins for item 71972 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","180 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1983."],"dc:identifier":["http://hdl.handle.net/2142/71806","(UMI)AAI8409889"],"dc:subject":["Engineering, Materials Science"],"dc:title":["X-Ray and Neutron Scattering Studies of Niobium-Hydrogen Alloys Near the Alpha-Prime to Beta Phase Transition"],"dc:type":["text"],"thesis:degree_discipline":["Metallurgical Engineering"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:05Z"}