Fibrous Growth of Niobium Carbide and Niobium Nitride by Discharge Method

نویسندگان
چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Synthesis and Characterization of a Niobium Nitride Precursor and Niobium Nitride Powder

Anodic dissolution of Nb foil in an electrolyte solution containing liquid NH3 and NH4Br produces an insoluble precursor that can be calcined to yield phase-pure NbN. Infrared spectroscopy is consistent with a precursor having the general formula NbXn(NH2)5-npNH3. By changing the calcination conditions, the phase of the resulting NbN powder can be varied. For example, calcining in pure Ar yield...

متن کامل

Secondary Electron Yield and AES Measurements on Oxides, Carbide and Nitride of Niobium*

-. Secondary electron yield measurements before and after Ar ion sputter cleaning were made on Nb and Nb compounds of interest for rf superconducting cavities. Total secondary electron yields (a) for primary energies 20-1500 eV were measured for solid Nb (a max = 1.3 at 300 eV), anodized NbzOs (a max = 1.2 at 300 eV) and powders of: Nb(a max = 1.0 at 400 eV), NbO (a max = 0.9 at 400 eV), NbOz (...

متن کامل

Mixed amido/imido/guanidinato complexes of niobium: potential precursors for MOCVD of niobium nitride thin films.

Novel mixed amido/imido/guanidinato complexes of niobium are reported. The complexes were synthesized by insertion of two equivalents of di-isopropylcarbodiimide (i-Pr-cdi) or bis-cyclohexylcarbodiimide (Cy-cdi) respectively, into the niobium-amido bonds of [Nb(NR(2))(3)(N-t-Bu)] (, R = Me; , R = Et) starting out from [NbCl(3)(N-t-Bu)(py)(2)] and the respective LiNR(2) reagent (py = pyridine). ...

متن کامل

Photoelectron spectroscopy of mono-niobium carbide clusters NbCn

Photoelectron spectroscopy of mono-niobium carbide clusters NbCn À „nÄ2 – 7...: Evidence for a cyclic to linear structural transition Hua-Jin Zhai, Shu-Rong Liu, Xi Li, and Lai-Sheng Wang Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99352 and W. R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, MS K8-8...

متن کامل

STUDY ON NIOBIUM CARBIDE COATING FORMATION ON AISI L2 STEEL USING THERMO-REACTIVE DEPOSITION METHOD

In the present research, to form niobium carbide coating on the surface of AISI L2 steel Thermo-Reactive Deposition method (TRD) in a molten bath was used. Niobium carbide coating treatment was carried out at 1173 K, 1273 K, and 1373 K for 2, 4, and 8 hours. The molten bath contained 20wt.% borax (Na2B4O7), 5 wt.% boric acid (B2O3), and 75 wt.% ferro-niobium. The presence and properties of...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: The Journal of the Society of Chemical Industry, Japan

سال: 1971

ISSN: 0023-2734,2185-0860

DOI: 10.1246/nikkashi1898.74.10_2029