Research SummaryHigh-temperature alloys How would you… …describe the overall signifi cance of this paper?Mo-Si-B alloys are a leading candidate for the next generation of jet turbine engine blades. They have the potential to raise turbine operating temperatures 300-400°C, increasing both power and effi ciency. The new processing method presented in this paper creates a fi ne-grained microstructure with a continuous molybdenum matrix phase, which is necessary for high strength and toughness.…describe this work to a materials science and engineering professional with no experience in your technical specialty?Mo-Si-B alloys are a three-phase system with the molybdenum solid solution and two intermetallic phases. Melt-based processing yields alloys with an intermetallic matrix, but a continuous molybdenum matrix is required for high strength and toughness. A powder metallurgy method using the reaction of molybdenum with silicon and boron nitrides is presented. This process uses standard power processing techniques, creating Mo-Si-B alloys in a less expensive manner than previously demonstrated.
…describe this work to a layperson?Molybdenum-silicon-boron alloys are being investigated for use in jet engines. They allow for much hotter operating temperatures than the metals currently used, which improves performance. The research presented in this paper describes a method for making the metal parts from metal and ceramic powders. The method developed also allows for formation of the parts in a nearly fi nished form, reducing the amount of machining needed for the fi nal parts.
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