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Title: Advanced Gas Cooled Nuclear Reactor Materials Evaluation and Development Program: Topical report I, selection of candidate alloys. Volume 3. Selection of surface coating/substrate systems for screening creep and structural stability studies

Considering the high temperature, low O/sub 2/, high C environment of operation in the Very High Temperature Reactor (VHTR) Systems, the utilization of coatings is envisaged to hold potential for extending component lifetimes through the formation of stable and continuous oxide films with enhanced resistance to C diffusion. A survey of the current state of technology for high temperature coatings has been performed. The usefulness of these coatings on the Mo, Ni, and Fe base alloys is discussed. Specifically, no coating substitute was identified for TZM other than the well known W-3 (pack silicide) and Al/sub 2/O/sub 3/ forming coatings were recommended for the Fe and Ni base structural materials. Recommendations as to coating types and processng have been made based on the predicted VHTR component size, shape, base metal and operational environment. Four tests designed to evaluate the effects of selected combinations of coatings and substrate matrices are recommended for consideration.
Publication Date:
OSTI Identifier:
6817129
Report Number(s):
COO-2975-16(Vol.3)
DOE Contract Number:
AC02-76ET34202
Resource Type:
Technical Report
Research Org:
General Electric Co., Schenectady, NY (USA). Energy Systems Programs Dept.
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; HTGR TYPE REACTORS; REACTOR MATERIALS; CREEP; SURFACE COATING; TENSILE PROPERTIES; ALLOYS; ALUMINIUM OXIDES; DIRECT CYCLE COOLING SYSTEMS; GAS TURBINES; PERFORMANCE; SILICON OXIDES; TITANIUM OXIDES; ALUMINIUM COMPOUNDS; CHALCOGENIDES; COOLING SYSTEMS; DEPOSITION; GAS COOLED REACTORS; GRAPHITE MODERATED REACTORS; MACHINERY; MATERIALS; MECHANICAL PROPERTIES; OXIDES; OXYGEN COMPOUNDS; REACTOR COMPONENTS; REACTOR COOLING SYSTEMS; REACTORS; SILICON COMPOUNDS; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; TURBINES; TURBOMACHINERY 210300* -- Power Reactors, Nonbreeding, Graphite Moderated