High-Temperature Materials Systems Emerging Applications, Materials, and Science Gaps: Proceedings of a Workshop-in Brief (2023) / Chapter Skim
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Proceedings of a Workshop - in Brief
Proceedings of a Workshop - in Brief
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The second session examined new approaches in manufacturing intended to create The workshop was organized by a planning committee of scalable, sustainable supply chains for novel materials the National Academies' Defense Materials, Manufactur- systems. The third session focused on existing materiing, and Its Infrastructure (DMMI)
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gave the first keynote address, arate, but emerging tools are making it more feasible to focusing on the ways in which hypersonic vehicle design include materials parameters. In response to a question drives material requirements.
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discussed opportunities and challenges with DESIGN CHALLENGES IN HIGH-TEMPERATURE MATERIALS UHTCs. Boride and carbide ceramics, first synthesized SYSTEMS in the 1800s, have for decades been evaluated for hyperThere are very few materials that can function in ultra- sonic vehicle design criteria, such as heat flux, surface high temperatures.
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Maloney highlighted inevitable coating loss and Underscoring the need to test emerging materials sys- oxidation, which varies by temperature, as critical issues tems at ultra-high temperatures -- as opposed to indi- for vehicle design.10 Van Wie added that energy dissividual materials design and experimentation -- Begley pation, thermal balance, and thermal protection pose emphasized that more research is also needed to advance enormous materials and design challenges, especially rapid-throughput analysis tools for AM processes and at extreme velocities. Sudre emphasized the need for lattice topology optimizations, especially for damage tools to design and evaluate smaller components' failure prediction.
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Noting that coating systems ogy, oxidation of coatings, thermal roll-off, and ductility. are not homogeneous, as they are often assumed to be, In addition, he asserted that an upgraded supply chain Van Wie said that integrative design across systems could for these materials will require substantial national inimprove the performance of coatings' outermost layer.
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processing innovations to increase efficiency and reduce costs, which can also allow for increased demand, and Vasisht Venkatesh (Pratt & Whitney) cited ICME as an imspecialized supply chain infrastructure to access elements portant tool to create a more integrated, holistic mateand better prepare for inevitable disruptions and short- rials design process because it optimizes the properties ages.15 He concluded by observing that as technologies and manufacturing requirements of a system's various evolve, critical materials components will also evolve, components, examining every portion of the design cycle and both materials scientists and supply chain experts via interconnected, verified, and validated modeling.
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UVM's 30 kW Inductively Coupled recombination.17 ICP testing remains a complicated enPlasma (ICP) Torch Facility has unique capabilities for deavor, but it may be possible to simplify the process evaluating candidate thermal protection materials for if materials designers can control surface emissivity sustained hypersonic flight by providing quantitative and eliminate oxide formation or design a material that measurements -- which cannot be achieved through arc- changes temperature through transpiration cooling or jet testing -- that are critical to understanding how the oxide ejection, Fletcher noted.
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Despite chal- across many stages of materials testing. Noting that lenges related to imaging, image stability, and surface current testing methods are difficult, expensive, and not conditioning,20 he posited that improved DIC techniques widely available and require material maturity, David can be used to develop faithful virtual test specimens Poerschke (University of Minnesota)
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discussed the use of vapor for more collaboration. Opeka noted that systems design pressure measurements to improve understanding of is so segregated that basic information, such as vehicle thermodynamic material properties.
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24 rence Berkeley National Laboratory) shared his expe rience of finding a rhenium substitute using electronic Jacobson said that future progress in this area will re- structure and thermodynamic criteria to illustrate the quire more thermodynamic data in order to improve opportunities to design lower cost, more accessible, and computational fluid dynamics modeling, make more reusable high-temperature alloys.
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citizens. UCAH also fosters widespread in hypersonic candidate materials, points to relationships between systems designers and materials fundamental questions about diffusion mechanisms, the developers, a need mentioned several times during the structure and dynamics of dislocations, and the nature workshop, by pairing research solicitations with govof vacancies, interfaces, and grain boundaries that pres- ernment agencies to identify systems applications.
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Participants also identified a need to test them. As Wadley noted in his concluding remarks, for a greater variety of testing methods, new testing the workshop discussions demonstrated that there restandards, and expanded testing facilities.
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