نتایج جستجو برای: 12co
تعداد نتایج: 317 فیلتر نتایج به سال:
Based on a new and large sample of optical and near-infrared spectra obtained at the Mount Stromlo and Siding Spring Observatories (Lançon & Wood 1998; Lançon & Wood, in preparation), spectrophotometric properties of cool oxygenand carbon-rich Long Period Variables and supergiants are presented. Temperatures of oxygen-rich stars are assigned by comparison with synthetic spectra computed from up...
تنشهای پسماند، خاصیت جداییناپذیرِ پوششهای پاشش حرارتی مانند پوششهای کاربید تنگستن کبالت، بسته به حالتشان میتوانند برای عملکرد و عمر قطعه زیانبار یا مفید باشند. در پژوهش حاضر، هدف بررسی تنشهای پسماند در راستای ضخامت پوشش پاشش حرارتی wc-12co حاصل از فرآیند hvof بود. این تنشها با استفاده از پراش پرتو x در سطح آزاد پوشش و در راستای ضخامت پوشش در عمقهای 50، 150، 230 و 300 میکرومتر بررسی شد...
Laser-Directed Energy Deposition (L-DED) is an additive manufacturing technique that has lately been employed to deposit coatings of cemented carbides, such as WC-Co. During deposition, complex microstructural phenomena usually occur, strongly affecting the and mechanical behavior coatings. Post-fabrication heat treatments (PFHTs) may be applied homogenize strengthen microstructure; nevertheles...
We carried out an ALMA survey of 15 confirmed or candidate low-mass (<0.2 M ) members of the TW Hya Association (TWA) with the goal of detecting molecular gas in the form of CO emission, as well as of providing constraints on continuum emission due to cold dust. Our targets have spectral types of M4-L0 and hence represent the extreme low end of the TWA’s mass function. Our ALMA survey has yield...
New and archival interferometric 12CO(1→0) datasets from six nearby galaxies are combined with H2 2.122 μm and Hα maps to explore in detail the interstellar medium in different star-forming galaxies. We investigate the relation between warm (H2 at T ∼ 2000 K) and cold (CO at T ∼ 50 K) molecular gas from 100 pc to 2 kpc scales. On these scales, the ratio of warm-to-cold molecular hydrogen correl...
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