Results 81 to 90 of about 12,821 (221)

Microstructural and tribological characterization of niobium boride coating produced on AISI 1020 steel via multicomponent boriding

Materials Research Express, 2020
Niobium boride coating was produced on AISI 1020 steel by multicomponent boriding process. Boriding treatment at1000 °C for 4 h was followed by thermo-reactive diffusion technique at 1000 °C for 6 h under argon atmosphere.
A P Krelling, E A S Almeida, C E da Costa, J C G Milan   +3 more
doaj   +1 more source

Pressed boride cathodes [PDF]

Results of experimental studies of emission cathodes made from lanthanum, yttrium, and gadolinium hexaborides are presented. Maximum thermal emission was obtained from lanthanum hexaboride electrodes.
Wolski, W.
core   +1 more source

Enhancement of Jc by Hf -Doping in the Superconductor MgB2: A Hyperfine Interaction Study

, 2008
Measurements of the critical current density (Jc) by magnetization and the upper critical field (Hc2) by magnetoresistance have been performed for hafnium-doped MgB2.
A. Banerjee, A. Talapatra, Braccini, Butz, Butz, Cava, Chen, de la Pena, Dou, Ferrando, Gurevich, Gurevich, Haigh, Horhager, Indris, Kaufmann, Kortus, Mali, Matsumoto, Mazin, Mura, P. Barat, Perner, Pintu Sen, R. Rawat, Rowell, Ryu, S.K. Bandyopadhyay, S.K. Das, T. Butz, Talapatra, Talapatra, Yamamoto   +32 more
core   +1 more source

X-ray photoelectron spectroscopy study of radiofrequency sputtered chromium bromide, molybdenum disilicide, and molybdenum disulfide coatings and their friction properties [PDF]

Radiofrequency sputtered coatings of CRB2, MOSI2, and MOS2 were examined by X-ray photoelectron spectroscopy. The effects of sputtering target history, deposition time, RF power level, and substrate bias on film composition were studied.
Brainard, W. A., Wheeler, D. R.
core   +2 more sources

Muon-spin-rotation measurements of the penetration depth in Li_2Pd_3B

, 2006
Measurements of the magnetic field penetration depth $\lambda$ in the ternary boride superconductor Li$_2$Pd$_3$B ($T_c\simeq7.3$ K) have been carried out by means of muon-spin rotation ($\mu$SR).
A. Maisuradze, A. Schenck, C. Baines, F. La Mattina, H. Keller, I. L. Landau, J. H. Brewer, K. Togano, R. Khasanov   +8 more
core   +1 more source

Effect of Nb and B on the Precipitation Behaviors in Al-Ti-Nb Balanced-Ratio Ni-Based Superalloy: A Phase-Field Study

Crystals
In this paper, quantitative two-dimensional (2-D) phase-field simulations were performed to gain insight into the effects of B and Nb for Al-Ti-Nb balanced-ratio GH4742 alloys.
Na Ta, Hongguang Zhou, Cong Zhang, Ruijie Zhang, Lijun Zhang   +4 more
doaj   +1 more source

Investigation of the fracture mechanics of boride composites [PDF]

Processing studies designed to produce boride composites with metal additives to lower fabrication temperatures and increase the impact strength are reported.
Kaufman, L. A.
core   +1 more source

Potential super-hard Osmium di-nitride with fluorite structure: First-principles calculations

, 2006
We have performed systematic first-principles calculations on di-carbide, -nitride, -oxide and -boride of platinum and osmium with the fluorite structure. It is found that only PtN$_{2}$, OsN$_{2}$ and OsO$_{2}$ are mechanically stable. In particular OsN$
C. Kittel, Chang-Zeng Fan, D. M. Teter, D. W. He, E. A. Brandes, J. F. Nye, Li-Xin Li, M. I. Eremets, Ping Zhang, Ri-Ping Liu, Song-Yan Zeng, V. V. Brazhkin, W. B. Pearson, Wen-Kui Wang, Yu-Gui Yao, Zai-Ji Zhan   +15 more
core   +2 more sources

New transformation mechanism of TiB from Bf to B27 structure in β-solidified TiAl alloys

Materials Research Letters
Both transformations of structure and morphology occur on the borides formed in β-solidified TiAl alloys during heat treatment at 1300℃. Flake-like TiB(Bf) transforms to blocky TiB(B27).
Songkuan Zhao, Bin Tang, Beibei Wei, Lei Zhu, Jinshan Li   +4 more
doaj   +1 more source

Large diameter multiwall nanotubes of MgB2: structural aspects and stability of superconducting nanotubular magnesium boride

, 2015
Based on a theoretical study, we demonstrated that magnesium boride nanotubes can reach the same stability as bulk MgB2 structure. However, most stable nanotubular forms are not structurally derived from mixed triangular-hexagonal structural motifs of a ...
Banacky, P., Noga, J., Noga, P., Szocs, V.   +3 more
core   +1 more source