نتایج جستجو برای: cr 3and ni 2)

تعداد نتایج: 2591818  

Journal: :international journal of environmental research 2013
k. moussaceb ch. belebchouche a. ait-mokhtar d. merabet

stabilization/ solidification (s/s) of hazardous waste by hydraulic binders is one of the mostpromising ways to reduce the polluting nature of ultimate waste. this study conducted at the laboratory scale, to study of the influence of various parameters namely: the ratio l/s, the contact time solid/liquid, surface and medium of exposure...etc., on the environmental impact of ultimate waste synth...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2000
ahmad emad kazem karami

the reaction between ni(ii), co(ii), cr(iii) bitrates, ni(ii) chloride and ambidentate a-keto ylide benzoylmethylenetriphenylphosphine (bppy) resulted in isolation of [ni(bppy)2](no3)2.2h2o, [ni(bppy)2]cl2, [co(bppy)2](no3)2 and [cr(bppy)3](no3)3; 2h2o. the compounds were characterized by elemental analyses and infrared 1hnmr spectroscopy, molar conductivity in solution and molecular weight mea...

2018
Li Jiahong Kong Dejun

Cr-Ni coatings with the mass ratios of 17% Cr-83% Ni, 20% Cr-80% Ni and 24% Cr-76% Ni were fabricated on H13 hot work mould steel using a laser cladding (LC). The surface-interface morphologies, chemical elements, surface roughness and phase composition of the obtained Cr-Ni coatings were analysed using a scanning electron microscope (SEM), energy disperse spectroscopy (EDS), atomic force micro...

2006
Pedro de Lima-Neto Adriana N. Correia P. da Silva

Neste trabalho foi estudada a influência dos parâmetros operacionais de eletrodeposição na estrutura, na morfologia dos revestimentos de Cr e Ni-Cr-P e no comportamento eletroquímico destes em meio aquoso contendo cloreto. Todos os eletrodepósitos foram obtidos sobre cobre. As camadas de Cr foram obtidas a partir de um banho industrial. Os eletrodepósitos amorfos de Ni-Cr-P foram obtidos a 60 °...

2011
Shigeru Saito Toshiyuki Takashima Katsumi Miyama Kazuya Kurokawa Toshio Narita

Compositions with tie lines between the and ( ; ) phases in a ternary Re-Cr-Ni system were investigated by heat treating various ternary Re-Cr-Ni alloys at 1573K in vacuum for up to 2000 h. The microstructures of the Re-containing alloys that had been water quenched after various heat treatment for times were observed and their concentration profiles for Re, Cr, and Ni were measured using an el...

2010
Xun CAI Kai FENG

In the present work, austenitic stainless steel 316L (SS316L) samples were implanted with Ni and Ni-Cr. A nickel-rich layer about 100 nm in thickness and a Ni-Cr enriched layer about 60 nm thick are formed on the surface of SS316L. The effects of ion implantation on the corrosion performance of SS316L are investigated in a 0.5 M H2SO4 with 2 ppm HF solution at 80°C by open circuit potential (OC...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده علوم 1390

چکیده: در خلا کاری pvd توسط دستگاه cr با ضخامتهای متفاوت ni/cr/fe چند لایهایهای مغناطیسی آنها (moke) و مغناطواپتیک ی اثر کر xrr و xrd 2 لایه نشانی شدند و خواص ساختاری ×10-6mbar را در چند لایه ای ni( و ( 111 cr(110) ، fe( بررسی شدند. بررسی های ساختاری جهت گیری ارجح ( 110 تشکیل ساختار تناوبی چند xrr ها نشان دادند و با افزایش ضخامت بلورینگی ساختار بیشتر شده است . بررسی جفت moke است . اندازه گ...

Journal: :Acta biomaterialia 2012
E L McGinley G P Moran G J P Fleming

Nickel-chromium (Ni-Cr) alloys used in fixed prosthodontics have been associated with type IV Ni-induced hypersensitivity. We hypothesised that the full-thickness human-derived oral mucosa model employed for biocompatibility testing of base-metal dental alloys would provide insights into the mechanisms of Ni-induced toxicity. Primary oral keratinocytes and gingival fibroblasts were seeded onto ...

Ahmad Emad Kazem Karami

The reaction between Ni(II), Co(II), cr(III) bitrates, Ni(II) chloride and ambidentate a-keto ylide benzoylmethylenetriphenylphosphine (BPPY) resulted in isolation of [Ni(BPPY)2](NO3)2.2H2O, [Ni(BPPY)2]Cl2, [Co(BPPY)2](NO3)2 and [Cr(BPPY)3](NO<sub...

Journal: :British journal of industrial medicine 1990
H Kollmeier J W Seemann G Rothe K M Müller P Wittig

Chromium (Cr) and nickel (Ni) concentrations were measured in lung tissue from 110 random necropsies by means of atomic absorption spectrometry. The subjects originated from the Ruhr district (Bochum (71 cases) and Dortmund (16 cases) areas), which has been defined as a particular pollution area with locally high Cr and Ni emissions, and from Münster and vicinity (23 cases). The Cr and Ni conce...

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