傾斜粉末成形体の焼結・冷却過程における応力解析(S18-3 粉末成形とその評価(3),S18 粉末成形とその評価)

概要

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The influence of material properties and graded structures on the internal stresses in multilayers during sintering as well as cooling is studied by numerical analysis with the aim of suppressing surface cracking. Although the basic equation that governs the stress generation during sintering is the same as cooling, effects of changing graded structures are different, depending on the related material constants. When the sintering stress increases upward to the top layer contrary to the decrease in thermal expansion coefficient, thinning the top layer results in the rise in tensile stress on the surface during sintering, while the thermal stress during cooling is lowered. To reduce the stress through the whole process, controlling the thickness of other layers is needed at the same time.
2004-09-04