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Silicon refining by a metallurgical processing route
(Ouro Preto, 2013)
Directional solidification experiments were carried out in a Bridgman furnace to remove carbon and metallic impurities from silicon. For carbon removal, solidification was achieved by extracting the mold from the hot into ...
Estudo da solidificação do aço rápido M2 em diferentes lingotes e seus efeitos na microestrutura e propriedades mecânicas finais
(Universidade Federal de São CarlosBRUFSCarPrograma de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEM, 2011-08-03)
The high speed steels are mostly applied in cutting tools, like drills, cores and top milling cutter. Its microstructure is composed by martensite, with high hardness, strong tempering resistance and disperses carbides on ...
Macrosegregation of Impurities in Directionally Solidified Silicon
(SPRINGER, 2011)
Directional solidification of molten metallurgical-grade Si was carried out in a vertical Bridgman furnace. The effects of changing the mold velocity from 5 to 110 mu m seconds(-1) on the macrosegregation of impurities ...
Structural quality in single crystalline CdSe ingots grown by PVT: Qualidade estrutural em lingotes de CdSe monocristalinos crescidos por PVT
(Universidade Federal do Rio de Janeiro, 2020-04)
CdSe is II-VI semiconductor with compact hexagonal structure. It has a band gap of 1.82 eV and a high stopping power for nuclear radiation. Single crystalline CdSe ingots were grown by Physical Vapor Transport (PVT) employing ...
Influência da temperatura de vazamento na microestrutura e dureza da liga fundida de alumínio A380 com adição do refinador 5Ti1B
(Universidade Tecnológica Federal do ParanáPonta GrossaBrasilDepartamento Acadêmico de Engenharia MecânicaEngenharia MecânicaUTFPR, 2021-07-30)
The aluminum alloy A380 has been used on a large scale in the industry due to its physicochemical characteristics of interest when high resistance to high temperatures is required. The variation of the cooling rate and the ...