Abstract WC-Co coatings sprayed by HVOF attracted much attentions, benefiting from the satisfactory wear resistance and high bonding strength to steel substrates. Nevertheless, density of conventional required excessive Co binder, which decreased hardness operation life. Based on this, a strengthened WC-30WB-10Co coating was developed with both improved hardness, using high-qualified thermal co...

Thermally sprayed cermet coatings are adequate solutions to improve cavitation and wear resistance of hydraulic turbines made stainless steel (SS), especially in rivers with a high sediment load, such as the Madeira River Brazil. However, some cermets easily dissolved river water, leading premature failure coating costly maintenance. Moreover, galvanic corrosion induced by coupling SS can accel...

Abstract We present the results of analyses 12CO (J = 1–0), 13CO and 2–1) emission data toward Gum 31. Three molecular clouds separated in velocity were detected at −25, −20, −10 km s−1. The structure 31 cannot be interpreted as an expanding motion. Two them, −25 s−1 cloud −20 cloud, are likely to associated with 31, because their 2–1)$/$12CO 1–0) intensity ratios high. found that these two sho...

Abstract The barred spiral galaxy NGC 613 has a star-forming ring in the center, and near-infrared observations have previously shown that star formation activity on eastern western sides of is asymmetric. We examined dynamics physical state molecular gas using high-resolution (∼15 pc) 12CO(1–0), 12CO(3–2), 13CO(1–0) with ALMA. Using dendrogram, we identified 111 clouds bar ring, found virial p...

The nearby Chamaeleon clouds have been observed in γ rays by the Fermi Large Area Telescope (LAT) and in thermal dust emission by Planck and IRAS. Cosmic rays and large dust grains, if smoothly mixed with gas, can jointly serve with the H i and 12CO radio data to (i) map the hydrogen column densities, NH, in the different gas phases, in particular at the dark neutral medium (DNM) transition bet...

The prominent infrared absorption band of solid CO – commonly observed towards young stellar objects (YSOs) – consists of three empirically determined components. The broad ‘red component’ (2136 cm−1, 4.681 μm) is generally attributed to solid CO mixed in a hydrogenbonded environment. Usually, CO embedded in the abundantly present water is considered. However, CO:H2O mixtures cannot reproduce t...

We present Infrared Space Observatory long-wavelength spectrometer observations of the proto-planetary nebula CRL 618, a star evolving very fast toward the planetary nebula stage. In addition to the lines of 12CO, 13CO, HCN, and HNC, we report on the detection of H2O and OH emission together with the fine-structure lines of [O i] at 63 and 145 µm. The abundance of the latter three species relat...

We present Institut de Radioastronomie Millimétrique Plateau de Bure Interferometer observations of the 12CO (3–2) emission from two far-infrared luminous QSOs at z ∼ 2.5 selected from the Herschel-Astrophysical Tetrahertz Large Area Survey. These far-infrared bright QSOs were selected to have supermassive black holes (SMBHs) with masses similar to those thought to reside in submillimetre galax...