نتایج جستجو برای: ti al cr si c n

تعداد نتایج: 2278606  

2014
E. O. OKORIE J. N. EGILA

Coal sediment samples from Okaba coal mine in Kogi State, Nigeria, were subjected to analysis for some metallic and non-metallic compositions. Of 35 elements determined by energy-dispersive X-ray fluorescence spectrometry, a number of anomalously high levels were recorded. Elements determined are Al, Si, P, S, K, Ca, Ti, Cr, Mn, V, Fe, Ni, Cu, Zn, Rb, Zr, Ru, Ba, Sr, Y, Se, Os, Bi, Sb, Pb, Mg, ...

2007
Bamidele I. Olu-Owolabi Sayo O. Fakayode Kayode O. Adebowale Patricia C. Onianwa

The proximate compositions (moisture, protein, ash, fat, crude fiber and carbohydrate) and levels of thirty seven elements (P, Ca, Cu, Mg, Mn, Na, K, Zn, Pb, Bi, Sn, Ti, Si, Tl, Sb, Ba, Se, Sr, S, Ag, Cd, Mo, Ni, Al, As, Be, Co, Cr, Sc, V, W, Zr, B, Ce, Li, Te and U) were determined in thirteen brands infant formulae samples obtained from three developing (Nigeria, South Africa and Venezuela) a...

Journal: :Frontiers in Materials 2022

The configurations of 10 types metal-doped silicon carbide (SiC) systems were investigated by the first-principles calculations. dopants include eight 3d-series transition metal atoms, one semi-metal Ge atom, and other Al atom. For all SiC systems, steadiest doping sites are fixed at substituted Si site, while Ti-SiC system exhibits most potent binding activity. properties these new vary with a...

Journal: :Transactions of the Iron and Steel Institute of Japan 1978

ژورنال: :علوم آب و خاک 0
محسن نائل m nael احمد جلالیان a jalalian1 حسین خادمی h khademi محمود کلباسی m kalbasi فرزاد ستوهیان f sotohian راینر شولین r schulin

عوامل زمین شناختی و خاک شناختی نقش بسیار مهمی بر رفتار عناصر در خاک های بکر دارند. به منظور تعیین نقش این عوامل بر غلظت و توزیع برخی عناصر اصلی و کمیاب در خاک، شش ماده مادری مختلف، شامل فیلیت، تونالیت، پریدوتیت، دولریت، شیل و سنگ آهک در منطقه فومن- ماسوله شناسایی و نحوه تشکیل و تکامل خاک های درجا در این مواد مادری مطالعه گردید. غلظت کل si، al، ca، mg، fe، ti، mn، ni، co، cr، cu، pb، v و zn در ک...

2009
B Saha E Liu S B Tor N W Khun D E Hardt J H Chun

Pure carbon(C), nitrogen(N) and titanium(Ti) doped diamond-like carbon (DLC) coatings were deposited on silicon (Si) micro-molds by dc magnetron sputtering deposition to improve the tribological performance of the micro-molds. The coated and uncoated Si molds were used in injection molding for the fabrication of secondary metal-molds, which were used for the replication of micro-fluidic devices...

Journal: :Metals 2022

Low-density materials show promising prospects for industrial application in engineering, and have remained a research hotspot. The ingots of Al15Zr40Ti28Nb12Cr5, Al15Zr40Ti28Nb12Mo5 Al15Zr40Ti28Nb12Si5 high-entropy alloys were prepared using an arc melting method. With the addition Cr, Mo, Si, phase structures these changed to dual phase. Cr Mo promote formation B2 phase, while Si promotes lar...

2013
Elnaz Ghadimi Hazem Eimar Benedetto Marelli Showan N Nazhat Masoud Asgharian Hojatollah Vali Faleh Tamimi

In previous studies, we showed that the size of apatite nanocrystals in tooth enamel can influence its physical properties. This important discovery raised a new question; which factors are regulating the size of these nanocrystals? Trace elements can affect crystallographic properties of synthetic apatite, therefore this study was designed to investigate how trace elements influence enamel's c...

1997
Bengt Gustafsson

We have derived elemental abundances of O, Ni as well as for a number of s-elements for 47 G and K dwarf, with Me/H]> 0:1 dex. The selection of stars was based on their kinematics as well as on their uvby ?-photometry. One sample of stars on rather eccentric orbits traces the chemical evolution interior to the solar orbit and another, on circular orbits, the evolution around the solar orbit. A ...

2007
Per Eklund Lars Hultman

In this Thesis, I have investigated multifunctional nanostructured Ti-Si-C thin films synthesized by magnetron sputtering in the substrate-temperature range from room temperature to 900 °C. The studies cover high-temperature growth of Ti3SiC2 and Ti4SiC3, low-temperature growth of Ti-Si-C nanocomposites, and Ti-Si-C-based multilayers, as well as their electrical, mechanical, and thermal-stabili...

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