Influence of interstitial atoms on the heat resistance of refractory metals

Lyutyi, E. M.

doi:10.1007/bf00721987

Cited by 3 publications

(3 citation statements)

References 4 publications

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“…The standard image reductions and photometry were made using the IRAF 2 . The magnitudes of the SN were derived by a PSF-fitting relatively to a sequence of local standard stars, which were calibrated by Lyutyi (1973), Doroshenko et al (2005), and Roberts & Rumstay (2012). The photometry was transformed to standard Johnson-Cousins UBV RI magnitudes by means of instrumental colour-terms.…”

Section: Observationsmentioning

confidence: 99%

Supernova 2018aoq and a distance to Seyfert galaxy NGC 4151

Tsvetkov

Бакланов

Potashov

et al. 2019

Monthly Notices of the Royal Astronomical Society

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We present optical photometric observations of SN 2018aoq from 2 to 100 days after explosion, and 7 spectra at epochs from 11 to 71 days. The light curves and spectra are typical for SNe II-P. As previously reported, SN 2018aoq appears to be of intermediate brightness between subluminous and normal SNe II-P. SN 2018aoq was discovered in Seyfert galaxy NGC 4151, for which the distance is uncertain. We utilised the Expanding Photosphere Method using three sets of filter combinations and velocities derived from the absorption minima of FeII lines and obtained a distance of 20.0±1.6 Mpc. The Standard Candle Method applied to SN 2018aoq yields a distance of 16.6±1.1 Mpc. Both values are consistent with the distance measurements for NGC 4151 based on geometric method.

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Section: Observationsmentioning

confidence: 99%

Supernova 2018aoq and a distance to Seyfert galaxy NGC 4151

Tsvetkov

Бакланов

Potashov

et al. 2019

Monthly Notices of the Royal Astronomical Society

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“…2012) and stars denote our observations. Oknyanskij et al (2012) suggested that NGC 4151 has different long-term variable time scales ranging from several years to tens of years, so we have reconstructed the historical light curve by combining our own observations with data in the literature (Zaitseva & Lyutyi 1969;Lyutyi 1973Lyutyi , 1977Belokon et al 1978;Lyuty & Doroshenko 1999;Doroshenko et al 2001;Oknyanskij et al 2012;Roberts & Rumstay 2012) and the raw photographic data from as early as 1910 to research periodicity. The long-term light curve in the B band was shown in Figure 2.…”

Section: Periodicity Analysismentioning

confidence: 99%

Optical monitoring of the Seyfert galaxy NGC 4151 and possible periodicities in its historical light curve

Guo¹,

Hu²,

Tao³

et al. 2014

Res. Astron. Astrophys.

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We report B, V, and R band CCD photometry of the Seyfert galaxy NGC 4151 obtained with the 1.0 m telescope at Weihai Observatory of Shandong University and the 1.56 m telescope at Shanghai Astronomical Observatory from 2005 December to 2013 February. Combining all available data from literature, we have constructed a historical light curve from 1910 to 2013 to study the periodicity of the source using three different methods (the Jurkevich method, the Lomb-Scargle periodogram method and the Discrete Correlation Function method). We find possible periods of P 1 = 4 ± 0.1, P 2 = 7.5 ± 0.3 and P 3 = 15.9 ± 0.3 yr.

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“…6) с определенной функцией каждого слоя [93]. Так, например, внешний слой будет участвовать в образовании оксидной пленки, обеспечивающей жаростойкость, барьерный слой будет препятствовать диффузионному растворению внешнего слоя, а внутренний слой будет спо-б собствовать релаксации напряжений в покрытии при изменениях температуры и обеспечивать согласование КТР отдельных составляющих покрытия и основы [94].…”

Section: высокотемпературные силицидные покрытия на тугоплавких металлахunclassified

High-Temperature Silicides: Properties and Application

Lytovchenko

2016

East Eur. J. Phys.

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The overview presents a historic retrospective and current state of research of structure, properties and application of hightemperature silicide materials in science and engineering. These materials, particularly construction and functional materials based on or involving silicide refractory metals, are a most important alternative class of materials which adequately complete with special alloys, intermetallic metals, and ceramics that are traditionally used at high (above 15000C) temperatures in oxidizing and other aggressiveenvironments. The paper analyzes the data available on constitutional diagrams, particularly on molybdenum-silicon and tungsten-silicon systems. Also, it shows differences in descriptions of diagrams given by different authors and considers some crystallochemical and physical properties of some high-temperature silicides. The paper reviews areas of application of high-temperature silicide materials of various types (layered and multiple-phase composites, consolidated powders, film structure, three-dimensional materials), and presents details of the challenges encountered in the process of creation and application of high-temperature protectingsilicide coatings, as well as possible ways to improve their performance. It is noted that lack of unified approach to presentation and correlation of research results as well as to description of real performance of materials is a substantial problem in creating new high-temperature silicide materials.

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Influence of interstitial atoms on the heat resistance of refractory metals

Cited by 3 publications

References 4 publications

Supernova 2018aoq and a distance to Seyfert galaxy NGC 4151

Supernova 2018aoq and a distance to Seyfert galaxy NGC 4151

Optical monitoring of the Seyfert galaxy NGC 4151 and possible periodicities in its historical light curve

High-Temperature Silicides: Properties and Application

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