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Photon CT Scanning of Advanced Ceramic Materials
Review of Progress in Quantitative Nondestructive Evaluation
Advanced ceramic materials (e.g. Si 3 N 4 , zr0 2 ' SiC, Al 2 0 3 ) are being developed for high temperature applications in advanced heat engines and high temperature heat recovery systems . Although fracture toughness has been a constant problem, advanced ceramics are now being developed with fracture toughnesses close to those of metals  . Small size flaws (10-200 ~m), small non-uniformities in density distributions (0.1-2%) present as long-range density gradients, and porous regionsdoi:10.1007/978-1-4613-1893-4_48 fatcat:7sh7r3je4nbx7dgqxuilnczuua