By Ichiro Shiota and Yoshinari Miyamoto (Eds.)
Read or Download Functionally Graded Materials 1996. Proceedings of the 4th International Symposium on Functionally Graded Materials, AIST Tsukuba Research Center, Tsukuba, Japan, October 21–24, 1996 PDF
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Additional info for Functionally Graded Materials 1996. Proceedings of the 4th International Symposium on Functionally Graded Materials, AIST Tsukuba Research Center, Tsukuba, Japan, October 21–24, 1996
1. Thermal stress analysis of TIC-Ni two layers material It can be seen from Table 2 that the stresses at the metal-ceramic interface are extremely high. For the radial stress GJ^ and the circumferential stress 099, the metal side is in compressive state and the ceramic side in tensile state, which due to the difference thermal expansion coefficient. The stress state of the axial stress a^z in Z-axis direction is quite the contrary. Such large stresses at the interface can easily lead to rupture failure of the two layers material.
2 and 3, the process time ratio can be expressed as ^ = k . i l ^ / , . i ^ = /;2 . 1 M o d e l s y s t e m For a full-scale system w^ith a suspension height of If — lOrmii^ a model suspension height with Im — 70 pm has been introduced. This corresponds to a model ratio of Ir = 10^. In the case of an applied centrifugal acceleration of gf — iO g (g ^ lOm/5^), the centrifugal acceleration for the model system gm. must be calculated according to Eq. 2, so that the dynamic similarity can be fulfilled.
R. China TiC/Ni3Al-Ni system was chosen for the potential use as the first wall materials of thermonuclear experimental reactors. The residual thermal stresses during fabrication were calculated by finite element inethod. 6 was reached. According to the design result, TiC/Ni3Al-Ni FGM samples were then successfully fabricated. L IISTRODUCTION In recent years functionally graded materials(FGMs) have received considerable attention. Ceramic/metal type FGMs are believed to be hold promise in applications for advanced technology, especially in aerospace and nuclear engineering, where the materials encounter high heat loads[l-2].