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Wyszukujesz frazę "Mayer, Christian." wg kryterium: Autor


Tytuł:
Scaling Behaviour of Si-alloyed Steel Slabs under Reheating Conditions
Autorzy:
Mikl, Gregor
Höfler, Thomas
Gierl-Mayer, Christian
Danninger, Herbert
Linder, Bernhard
Angeli, Gerhard
Tematy:
steel
hot rolling
oxidation
scale
alloy
Si oxides
Fe2SiO4
stal
walcowanie na gorąco
utlenianie
zgorzelina
stop
tlenki Si
Pokaż więcej
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Powiązania:
https://bibliotekanauki.pl/articles/2056032.pdf  Link otwiera się w nowym oknie
Opis:
Reheating of steel slabs for further processing such as hot rolling usually takes place in gas-fired pusher furnaces. Temperatures well above 1000°C, combined with an atmosphere containing H2O, CO2, and O2, lead to substantial oxidation of most steel grades. Newly developed advanced steels often contain significant amounts of Si. This element plays a dominant role in the scaling behaviour near the steel-scale-interface, since fayalite (Fe2SiO4) forms a eutectic with wuestite (Fe1–xO) that melts as low as 1177°C. To better understand the high temperature oxidation behaviour, lab-scale trials were performed with different steel grades containing up to 3 wt.% Si. Possible interactions of Si with other alloying elements present in the samples such as Cr, Mn and Al were also of interest. The atmosphere contained 20% H2O, 7% CO2, and 3% O2, resembling reheating conditions in pusher furnaces, and temperatures ranged from 1100 to 1240°C. For metallographic investigation, the oxidised samples were cold mounted under vacuum using taper section angles. After preparation, the sections were examined through light microscopy, SEM/EDS, XRD, and TEM. The local distribution of the alloying elements could be mapped efficiently, and phase identification was successful in most parts. Under the applied experimental conditions, the elements of interest were present in their oxidic form either as pure or as mixed oxides. Higher Si-contents led to an increased build-up of eutectic melting phase at the steel-scale-interface at temperatures above 1177°C, which in turn further accelerated the oxidation.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Minimizing indoor infection risks with automotive nanofiltration and with laminar vertical flow
Autorzy:
Czerwiński, Jan
Mayer, Andreas
Mayer, Jörg
Burtscher, Heinz
Lutz, Thomas
Mayer, Rainer
Rothen-Rutishauser, Barbara
Frey, Joachim
Lämmle, Christian
Rüggeberg, Tobias
Specht, Patrick
Tematy:
ventilation for virus protection
vertical laminar flow
nanoparticle separation
virus deactivation
ceramic honeycomb wall flow filter
nanofiltration
wentylacja dla ochrony przeciwwirusowej
pionowy przepływ laminarny
rozdzielanie nanocząstek
dezaktywacja wirusa
filtr ceramiczny o strukturze plastra miodu
nanofiltracja
Pokaż więcej
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Powiązania:
https://bibliotekanauki.pl/articles/24202467.pdf  Link otwiera się w nowym oknie
Opis:
The knowledge about nanoaerosols, their potential health effects, their measurement, limitation and administrative-legal treatment has been developed in the last 3 decades in connection with the exhaust gas cleaning of the combustion engines. Nanofiltration, which has thus become known, almost completely eliminates nanoparticles with filters of high durability, high specific filtration areas, and reasonable costs. On the occasion of the Covid pandemic, NanoCleanAir experimentally proved that the viruses in an automotive filter substrate are separated as well as the combustion particles and are also deactivated. To minimize cross exchange of infectious aerosol, new attention must be paid to flow management in ventilated spaces. Digitized flow analysis has also received significant inspiration from engine technology in the past. This paper provides information on some basic investigations and gives valuable advice based on the experimental and numerical results of a retrofitted classroom.
Dostawca treści:
Biblioteka Nauki
Artykuł

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