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Title: Surface studies on aluminized and thermally oxidized superalloy 690 substrates interacted with simulated nuclear waste and sodium borosilicate melt

Aluminized and thermally oxidized Ni-Cr-Fe based superalloy 690 substrates with Al{sub 2}O{sub 3} layer on top have been exposed in nitrate based environment (simulated high level nuclear liquid waste) at 373 K for 216 hours and sodium borosilicate melt at 1248 K for 192 hours. The surfaces of exposed samples have been characterized by using Electron probe micro-analyzer (EPMA). Elemental X-ray mapping on coated specimen that exposed in simulated nuclear waste solution revealed that the surface is enriched with Ni, Cr and Al. X-ray mapping on surface of the specimen that interacted with sodium borosilicate melt indicated that the surface is composed of Al, Fe, Ni and Cr.
Authors:
; ; ;  [1] ;  [2] ; ;  [3]
  1. Materials Science Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085 (India)
  2. High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085 (India)
  3. Waste Management Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085 (India)
Publication Date:
OSTI Identifier:
22271045
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1591; Journal Issue: 1; Conference: 58. DAE solid state physics symposium 2013, Patiala, Punjab (India), 17-21 Dec 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; ALUMINIUM OXIDES; BORON SILICATES; ELECTRON MICROPROBE ANALYSIS; ELECTRON PROBES; INCONEL 690; LIQUID WASTES; MAPPING; NITRATES; RADIOACTIVE WASTES; SIMULATION; SODIUM COMPOUNDS; SUBSTRATES; SURFACES; X-RAY FLUORESCENCE ANALYSIS