Ion Implantation
Mostrando 1-12 de 58 artigos, teses e dissertações.
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1. The Surface Treatment of Niobium Superconducting Reentrant Cavities by Means of High Temperature Nitrogen Plasma Based Ion Implantation
High Temperature Nitrogen Plasma Based Ion Implantation (HT-NPBII) has been used to treat the surface of niobium superconducting reentrant cavities, which are part of parametric transducers in a resonant-mass gravitational wave detector. The aim is to enhance the corresponding electrical quality factors (Q-factors) which are closely related with the increase
Mat. Res.. Publicado em: 13/12/2019
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2. Influence of the Pre-Treatments and Process Temperature on the Adhesion of TiN Films Deposited by PBII&D Over Nitrided Austenitic Stainless Steel
In this work the influence of pre-treatment cleaning processes in the adhesion of TiN films deposited by the plasma based ion implantation and deposition (PBII&D) process over plasma nitrided AISI 316L stainless steel was investigated, varying the gas composition, the duration of the sputtering process and the temperature in the same deposition chamber. The
Mat. Res.. Publicado em: 28/10/2019
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3. Feasibility of RF Sputtering and PIIID for production of thin films from red mud
During the extraction of aluminum from bauxite, a waste of oxides containing traces of heavy metals in a highly alkaline matrix, called Red Mud (RM), is produced. In this study RM is characterized and the feasibility of using it as a precursor for the production of thin films by Plasma Sputtering and by Plasma Immersion Ion Implantation and Deposition (PIIID
Mat. Res.. Publicado em: 26/10/2014
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4. Enhanced Production of Vitamin K2 from Bacillus subtilis (natto)by Mutation and Optimization of the Fermentation Medium
The aim of this study was to enhance the production of vitamin K2 by using N-methyl-N-nitro-N-nitroso-guanidine (NTG) and low energy ion beam implantation and optimizing the fermentation medium. Mutation resulted in 1.66-fold higher production of vitamin K2 than that of the parentl strain. The production by the mutant BN-P15-11-1was increased 55% and reached
Braz. arch. biol. technol.. Publicado em: 2014-08
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5. Improving Aspergillus niger tannase yield by N+ ion beam implantation
This work aimed to improve tannase yield of Aspergillus niger through N+ ion beam implantation in submerged fermentation. The energy and dose of N+ ion beam implantation were investigated. The results indicated that an excellent mutant was obtained through nine successive implantations under the conditions of 10 keV and 30-40 (×2.6×10(13)) ions/cm², and i
Braz. arch. biol. technol.. Publicado em: 2013-02
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6. A new method for surface modifications of carbon steels and alloys
A three-dimensional treatment method involving implantation of ions into solids immersed in a high voltage pulse discharge ignited on the left-hand-branch of the Paschen curve was elaborated about fifteen years ago. This method, named 3DII for short, has been used in the equipment JUPITER (Joint Universal Plasma and Ion Technologies Experimental Reactor) for
Mat. Res.. Publicado em: 11/10/2012
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7. Influência da implantação de íons de argônio por IIIP na formação do silício poroso / Influência da implantação de íons de argônio por IIIP na formação do silício poroso
O silício é o material dominante na área de microeletrônica devido à conveniência de suas propriedades elétricas, mas em detrimento da natureza de sua estrutura eletrônica suas propriedades associadas a foto-emissão são de rendimento muito baixo, fato que descarta sua aplicação em dispositivos optoeletrônicos, como: leds, lasers, displays, e div
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/07/2011
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8. Modificação superficial de titânio para promoção de osteointegração / Titanium modification for the promotion of osteointegration
O titânio é considerado um biomaterial (material biocompatível) pela baixa reatividade e pela grande estabilidade da sua camada de óxido superficial. Pelas suas propriedades mecânicas ele é usualmente utilizado na fabricação de substitutos ósseos e implantes dentários. Visando contribuir para o desenvolvimento de novas superfícies osteointegrávei
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/05/2011
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9. AÇO DUPLEX LDX 2101 SUBMETIDO À NITRETAÇÃO POR IMPLANTAÇÃO IÔNICA, IMPLANTAÇÃO IÔNICA POR IMERSÃO EM PLASMA E DESCARGA LUMINOSA: PROPRIEDADES MECÂNICAS E TRIBOLÓGICAS
In the present work showing the results on mechanical and tribological properties of duplex stainless steel LDX2101 nitriding by Ion Implantation (II), Plasma Immersion Ion Implantation (PI3) and Glow Discharge (GD). Nitrogen ion implantation was performed at room temperature and 350 C. The nitrogen fluencies were combined to obtain an atomic nitrogen concen
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/04/2011
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10. Threshold shifting of nmos transitions by arsenic ion implantation prior to gate oxidation
This paper reports on the threshold adjustment of NMOS transistors by arsenic ion implantation in the channel region directly into bare silicon just before the gate oxidation. Experimental results showed very good uniformity and reproducibility of the threshold voltages, low body effect, and high mobility values.
Publicado em: 2011
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11. Magnetostriction in ar/sup +/ implanted and annealed co/pd multilayers
Magnetostriction curves with (111) textured polycrystalline Co/Pd multilayers, as deposited or submitted to ArS ion implantation or thermal annealing, are presented and discussed. Both treatments, while promoting intermixing among CO and Pd atoms, induce an increase in the saturation magnetostriction values. The evolution of the engineering curves, however,
Publicado em: 2011
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12. Avaliação comparativa de recobrimentos superficiais para tuchos de válvula através de ensaios de desgaste / Comparative evaluation of surface coating for valve lifters through wear tests
Com o intuito de avaliar a eficiência de diferentes recobrimentos superficiais aplicados a tuchos de válvulas - um componente utilizado em motores à combustão - foram propostos alguns recobrimentos que foram comparados a um recobrimento já utilizado pela indústria. Para as avaliações foram realizados ensaios de microdureza, ensaios de desgaste micro-
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/07/2010