摘要:
A wrought stainless steel alloy composition includes 12% to 25% Cr, 8% to 25% Ni, 0.05% to 1% Nb, 0.05% to 10% Mn, 0.02% to 0.15% C, 0.02% to 0.5% N, with the balance iron, the composition having the capability of developing an engineered microstructure at a temperature above 550° C. The engineered microstructure includes an austenite matrix having therein a dispersion of intragranular NbC precipitates in a concentration in the range of 1010 to 1017 precipitates per cm3.
摘要翻译:锻造不锈钢合金组成包括12%至25%的Cr,8%至25%的Ni,0.05%至1%的Nb,0.05%至10%的Mn,0.02%至0.15%的C,0.02%至0.5%的N, 余量为铁,该组合物具有在高于550℃的温度下显影工程微结构的能力。工程组织包括奥氏体基体,其中具有浓度在10 10范围内的颗粒内NbC沉淀物的分散体, / SUP>至10μL/ cm 3沉淀物/ cm 3。
摘要:
A ceramic-matrix composite having a multilayered interfacial coating adapted to protect the reinforcing fibers from long-term oxidation, while allowing these to bridge the wake of advancing cracks in the matrix, is provided by selectively mismatching materials within adjacent layers of the interfacial coating, the materials having different coefficients of thermal expansion so that a low toughness interface region is created to promote crack deflection either within an interior layer of the mismatched interfacial coating or between adjacent layers of the mismatched interfacial coating.