Globally sourced mineral commodities used in U.S. Navy SEAL gear—An illustration of U.S. net import reliance

Brainard, Jamie; Nassar, Nedal T.; Gambogi, Joseph; Baker, Michael; Jarvis, Michael T.

doi:10.3133/gip183

Cited by 6 publications

(2 citation statements)

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“…Diante disso, o Exército Brasileiro busca manter atualizado a utilização de materiais eficientes como o caso estudado os materiais cerâmicos. Com o conhecimento a respeito da inovação tecnológica aqui estudada e somadas à aplicabilidade que o carbeto de silício oferece, a pesquisa se tem uma importante contribuição para o Exército Brasileiro, tendo em vista que o Brasil é o quinto maior produtor de carbeto de silício do mundo [2]. A sinterização do SiC é realizada em atmosfera inerte e em temperaturas elevadas, o que exige grande consumo de energia, além do uso de fornos muito caros, de difícil aquisição e acesso.…”

Section: Introductionunclassified

Nova Rota De Sinterização Do Carbeto De Silício Em Atmosfera Oxidante

Alkimim,

Campos,

Lima

et al. 2023

ABM Proceedings

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ResumoA perda de massa causa baixa densidade do SiC sinterizado via fase líquida, comprometendo suas propriedades termo-mecânicas. O objetivo deste trabalho foi desenvolver uma nova rota de sinterização do carbeto de silício (SiC). Tendo como objetivos específicos: Estudar o comportamento do SiC com o Al2O3 e Y2O3; Examinar as estruturas, a/as transformações de fases e a perda de massa das composições do SiC puro, do SiC − Al2O3, do SiC − Y2O3 e do SiC − Al2O3 − Y2O3, em temperaturas crescentes (500 até 1400 °C); investigar o encapsulamento das amostras utilizando uma fonte de carbono (SiC ou grafite), em atmosfera oxidante e inerte; Comparar a nova rota de processamento com a rota convencional (altas temperaturas e atmosfera inerte). Foram realizadas análises térmicas (TG) até 1600ºC, em atmosfera de argônio e MEV E DRX dos pós como recebidos. O SiC apresenta um ganho de massa pouco expressiva a aproximadamente 900ºC. O SiC com adição de Al2O3 e Y2O3 também apresenta um ganho pouco expressiva, o que poderá indicar uma provável oxidação do SiC segundo a literura.

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Section: Introductionunclassified

Nova Rota De Sinterização Do Carbeto De Silício Em Atmosfera Oxidante

Alkimim,

Campos,

Lima

et al. 2023

ABM Proceedings

View full text Add to dashboard Cite

show abstract

“…laptops, tablets, smart phones, etc.). These technologies are all considered essential for the economies and national security of developed countries, for efforts to reduce greenhouse gas emissions, and for the transition to low-carbon societies (European Commission 2017World Bank 2017;Brainard et al 2018;U.S. Department of the Interior 2018;Fortier et al 2020;Hund et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Economic Geology Models 5. Specialty, Critical, Battery, Magnet and Photovoltaic Materials: Market Facts, Projections and Implications for Exploration and Development

Simandl¹,

Simandl

Paradis

2021

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Many exploration companies are now focusing on specialty materials that are associated with so-called ‘green technology’. These include ‘battery materials’, ‘magnet materials’ and ‘photovoltaic materials’, and many such commodities are also broadly labelled as ‘critical materials’ because they are seen as vital for industrial development, societal needs or national security. The definitions used for such materials are not always consistent among jurisdictions or across industry, and this paper attempts to clarify the criteria and address some common misconceptions. The distinction between major minerals (e.g. base metals) and ‘specialty materials’ (i.e. those mined or produced in much smaller amounts) is particularly important. The markets for many specialty materials are growing faster than those for traditional ferrous, precious and base metals and they are often portrayed as excellent long-term investment opportunities. However, the small market bases for specialty materials and considerable uncertainty around growth projections (especially related to material substitutions and rapid technological change) need to be taken into consideration for objective assessment of the development potential of any proposed project, establishment of new supply chains by major corporations, and responsible decision-making (mineral policy) by government. In the short-term, projects aimed at specialty materials (materials with a small market base) cannot benefit from economy of scale, and their development hinges on commercially proven metallurgical processes, unless they are supported by governments or end-users. Several specialty metals (e.g. germanium, indium, cadmium, and cobalt) are commonly obtained as by-product of base metal extraction. In such cases, systematic testing of base metal ores for their specialty metal content may justify the addition of relevant recovery circuits to existing smelters. If positive results are obtained, the need for targeting new sources of such specialty metals as primary exploration targets may be reduced or eliminated. Where market conditions permit and concerns about the future availability of materials seem reliable, grass-roots exploration for specialty materials is warranted, and pre-competitive government involvement may be justified to promote such development efforts.

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Strategic Overload: Die neue Rohstoffstrategie Deutschlands zwischen Pragmatismus und Überambition

Kullik

Schmid

2021

SIRIUS – Zeitschrift Für Strategische Analysen

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Zusammenfassung Die Anfang 2020 erschienene deutsche Rohstoffstrategie soll zu einer ökologisch und sozial verträglichen, zuverlässigen und wettbewerbsfähigen Rohstoffversorgung der deutschen Wirtschaft beitragen. Sie ist damit eine politische Antwort auf drängende Herausforderungen im Rohstoffsektor, insbesondere die hohe Versorgungsabhängigkeit Deutschlands und die protektionistischen Tendenzen Chinas bei kritischen Rohstoffen, die für grüne Technologien benötigt werden. Im Gegensatz zur alten Rohstoffstrategie aus dem Jahr 2010 ist die überarbeitete deutsche Rohstoffstrategie deutlich ambitionierter und versucht, die aktuellen Herausforderungen zu adressieren. Angesichts des dadurch drohenden strategic overload stellt sich allerdings die Frage, ob ein europäischer Ansatz zu favorisieren wäre.

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Globally sourced mineral commodities used in U.S. Navy SEAL gear—An illustration of U.S. net import reliance

Abstract: A U.S. Navy SEAL carries gear containing at least 23 nonfuel mineral commodities for which the United States is greater than 50 percent net import reliant. CONGO (KINSHASA) CHINA SOUTH AFRICA MEXICO M4 carbine Communications gear and global positioning system Night vision goggles

Cited by 6 publications

References 0 publications

Nova Rota De Sinterização Do Carbeto De Silício Em Atmosfera Oxidante

Nova Rota De Sinterização Do Carbeto De Silício Em Atmosfera Oxidante

Economic Geology Models 5. Specialty, Critical, Battery, Magnet and Photovoltaic Materials: Market Facts, Projections and Implications for Exploration and Development

Strategic Overload: Die neue Rohstoffstrategie Deutschlands zwischen Pragmatismus und Überambition

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