Papers by Author: Yasutoshi Noda

Abstract: Minimum interlayer numbers of functionally graded materials (FGMs) are studied based on the empirical analysis of thermal stress due to the differences in the thermal expansion coefficient  and temperature T between sintering and room temperatures. It is found the maximum ,   and the minimum interlayer number necessary to produce a NiCr / Fly ash FGM structure without interface cracking were 4.0×10-6 K-1, 1080 K, 0.043 and 2, respectively. The condition  < 0.043 was derived and confirmed to be valid for available FGM systems.