A study of reaction between palladium, palladium silver alloy and silicon carbide ceramics at high temperature. Issue 8 (July 2023)

• Record Type: Journal Article
• Authors: Liu, Han; Chen, Ying; Gao, Zhaohe; Rohbeck, Nadia; Xiao, Ping
• Is Part Of: Journal of the European Ceramic Society. Volume 43:Issue 8(2023)
• Page Start: 3077
• Page End: 3089
• Publication Date: 2023-07
• Subjects: Silicon carbide -- Ceramic -- Reaction -- Electron microscope -- High temperature; TRISO TRi-structural ISOtropic fuel particles -- HTGR High Temperature Gas-cooled Reactor -- FP Fission Product -- GB Grain Boundary -- SEM Scanning Electron Microscope -- EDS Energy Dispersive Spectroscopy -- FIB Focused Ion Beam -- TEM Transmission Electron Microscope -- BSE Backscattered Electron -- SAED Selected Area Electron Diffraction -- IGP Inter-granular Penetration -- AGR Advanced Gas Reactor; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2023.02.032
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: The reactions between palladium (Pd), palladium-silver alloy (Pd-Ag) and silicon carbide (SiC) from 1200 °C to 1400 °C have been studied to investigate the impact of liquid phases on reaction products formation. The liquid phases were generated in Pd/SiC reactions at 1400 °C and in Pd-Ag/SiC reactions above 1300 °C. An increase in the amount of liquid associated with higher temperatures or Ag presence strongly affected the reaction mechanism and was responsible for the inhomogeneous dissolution of SiC grains and grain boundaries by Pd-rich phase at reaction front. This study helps understand Pd's role on Ag release through SiC layer in Tri-structural isotropic (TRISO) fuel particles.