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Soft Magnetic Composites (SMCs) typically consist of large iron particles coated with a fairly thin inorganic layer. The combination of soft particles with a brittle layer causes, however, a rather poor mechanical behaviour of the SMCs. The particle boundaries of the specific SMC Somaloy 700 3P can be classified into four different types according to the complexity of their layers. Tests on both micro- and macroscale showed that the particle-boundary interface is critical in terms of failure.
mechanische Eigenschaften --- Charakterisierung --- Soft magnetic composites --- characterisation --- Nanoindentation --- Weichmagnetische Verbundwerkstoffe --- nanoindentation --- mechanical properties
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Es wird die Herstellung und Charakterisierung von partikulären Stahl-Keramik-Verbundwerkstoffen beschrieben. Die Rohmaterialien wurden pulvermetallurgisch verarbeitet und durch sogenanntes ""Field Assisted Sintering"" (auch SPS) verdichtet. Anschließend wurde Mikrostruktur, Härtbarkeit, mechanische und tribologische Eigenschaften untersucht. Härte und Verschleißbeständigkeit konnten deutlich verbessert werden, wobei die Festigkeit und Zähigkeit mit höheren Partikelgehalten deutlich abnahm.
Maraging Stahl --- mechanische Eigenschaften --- Metall-Keramik-Verbund --- Tribologie --- Spark Plasma Sintering
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This book investigates the tension, fatigue and microstructural properties of micro powder injection molded (µPIM) 17-4PH stainless steel components typically used in micro systems technology. The comparison with conventional produced bulk material showed already comparable mechanical properties but need for microstructural optimization.
Ermüdung --- Mikropulverspritzguss --- fatigue --- 17-4PH Edelstahl --- Mikromechanisches Prüfen17-4PH stainless steel --- mechnical properties --- Mechanische Eigenschaften --- small scale testing --- µPIM
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AlSi12-based metal matrix composites using metallic glass Ni??Nb??Ta?? as reinforcement were produced via gas pressure melt infiltration technique. Comprehensive investigations were performed to determine the composite´s microstructural, mechanical and thermal properties as well as damage mechanisms. The results contribute to a better understanding on the material´s processing-structure-property relations.
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