Heating-Rate Measurements Developed from In-Situ Thermocouples Using a Voltage-Rate Interface

2006 ◽  
Author(s):  
Jay Frankel ◽  
Rao Arimilli ◽  
Majid Keyhani ◽  
Jayne Wu
Keyword(s):  
Heating Rate

scholarly journals Fabrication of Metastable Crystalline Nanocomposites by Flash Annealing of Cu47.5Zr47.5Al5 Metallic Glass Using Joule Heating

Nanomaterials ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 84 ◽  
Author(s):  
Ilya Okulov ◽  
Ivan Soldatov ◽  
Ivan Kaban ◽  
Baran Sarac ◽  
Florian Spieckermann ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Metallic Glass ◽  
Heating Rate ◽  
Joule Heating ◽  
Annealing Time ◽  
Volume Fraction ◽  
Glassy Material ◽  
Flash Annealing ◽  
Temperature Equilibrium

Flash Joule-heating was applied to the Cu47.5Zr47.5Al5 metallic glass for designing fully crystalline metastable nanocomposites consisting of the metastable B2 CuZr and low-temperature equilibrium Cu10Zr7 phases. The onset of crystallization was in situ controlled by monitoring resistivity changes in the samples. The effect of heating rate and annealing time on the volume fraction of the crystalline phases and mechanical properties of the nanocomposites was studied in detail. Particularly, an increase of the heating rate and a decrease of the annealing time lead to a lower number of equilibrium Cu10Zr7 precipitates and an increase of tensile ductility. Tailoring of these non-equilibrium microstructures and mechanical properties may not be possible unless one starts with a fully glassy material that opens new perspectives for designing metastable nanomaterials with unique physical properties.

scholarly journals Dilation of Ti-6Al-4V/HA Composite Tensile Parts

2002 ◽  
Vol 11 (2) ◽  
pp. 096369350201100
Author(s):  
E. S. Thian ◽  
N. H. Loh ◽  
K. A. Khor ◽  
S. B. Tor
Keyword(s):  
Heating Rate ◽  
Sintering Temperature ◽  
Holding Time ◽  
Test Results ◽  
Basic Information ◽  
Sintering Process ◽  
Densification Rate ◽  
In Situ Test ◽  
Temperature Heating

Prior to the actual sintering process, a dilatometry study is performed to provide basic information and guidelines. This paper studies the effects of three sintering factors: sintering temperature, heating rate and holding time, on the densification rate of Ti-6Al-4V/HA composite parts. According to the in-situ test results, suitable values for the sintering factors can then be established.

The influence of heating rate on template removal in silicalite-1: An in situ HT-XRPD study

2006 ◽  
Vol 89 (1-3) ◽  
pp. 1-8 ◽  
Author(s):  
Magdalena Lassinantti Gualtieri ◽  
Alessandro F. Gualtieri ◽  
Jonas Hedlund
Keyword(s):  
Heating Rate ◽  
Template Removal

scholarly journals Radiative forcing associated with a springtime case of Bodélé and Sudan dust transport over West Africa

2010 ◽  
Vol 10 (4) ◽  
pp. 8811-8858 ◽  
Author(s):  
C. Lemaître ◽  
C. Flamant ◽  
J. Cuesta ◽  
J.-C. Raut ◽  
P. Chazette ◽  
...  
Keyword(s):  
West Africa ◽  
Heating Rate ◽  
Radiative Forcing ◽  
Mineral Dust ◽  
Regional Scale ◽  
Longwave Radiation ◽  
Heating Rates ◽  
Dust Layer ◽  
In Situ Observations

Abstract. The radiative forcing due to mineral dust over West Africa is investigated using the radiative code STREAMER, as well as remote sensing and in situ observations gathered during the African Monsoon Multidisciplinary Analysis Special Observing Period (AMMA SOP). We focus on two days (13 and 14 June 2006) of an intense and long-lasting episode of dust being lifted in remote sources in Chad and Sudan and transported across West Africa in the African easterly jet region, during which airborne operations were conducted at the regional scale, from the southern fringes of the Sahara to the Gulf of Guinea. Profiles of heating rates are computed from airborne LEANDRE 2 and space-borne CALIOP lidar observations using two mineral dust model constrained by airborne in situ data and ground-based sunphotometer obtained during the campaign. Complementary space-borne observations (from MODIS) and in-situ observations such as dropsondes are also used to take into account a realistic infrared contribution of the water vapour. We investigate the variability of the heating rate on the vertical within a dust plume, as well as the contribution of longwave radiation to the heating rate and the radiative forcing of dust during the nighttime. The sensitivity of the so-derived heating rate is also analyzed for some key variables for which the associated uncertainties are quite large. During daytime, the warming associated with the presence of dust was found to be between 1.5 K day−1 and 4 K day−1, on average, depending on altitude and latitude. Strong warming (i.e. heating rates as high as 8 K day−1) was also observed locally in some limited part of the dust plumes. Obviously, during nighttime much smaller values of heating/cooling are retrieved (less than ±1 K day−1) but large enough to modify the low tropospheric equilibrium. Furthermore, cooling is observed as the result of the longwave forcing in the dust layer, while warming is observed below the dust layer, in the monsoon layer.

scholarly journals Ultra-high heating rate effects on the sintering of ceramic nanoparticles: an in situ TEM study

2021 ◽  
Vol 9 (9) ◽  
pp. 373-381
Author(s):  
Xin Li Phuah ◽  
Jie Jian ◽  
Han Wang ◽  
Xuejing Wang ◽  
Xinghang Zhang ◽  
...  
Keyword(s):  
Heating Rate ◽  
In Situ Tem ◽  
High Heating Rate ◽  
Ceramic Nanoparticles ◽  
Rate Effects ◽  
High Heating

scholarly journals In-situ imaging of fracture development during maturation of an organic-rich shale: Effects of heating rate and confinement

2018 ◽  
Vol 95 ◽  
pp. 314-327 ◽  
Author(s):  
Hamed Panahi ◽  
Maya Kobchenko ◽  
Paul Meakin ◽  
Dag Kristian Dysthe ◽  
François Renard
Keyword(s):  
Heating Rate ◽  
Fracture Development ◽  
In Situ Imaging

scholarly journals In situ vertical characteristics of optical properties and heating rates of aerosol over Beijing

2020 ◽  
Vol 20 (4) ◽  
pp. 2603-2622 ◽  
Author(s):  
Ping Tian ◽  
Dantong Liu ◽  
Delong Zhao ◽  
Chenjie Yu ◽  
Quan Liu ◽  
...  
Keyword(s):  
Optical Properties ◽  
Heating Rate ◽  
Optical Depth ◽  
In Situ Measurements ◽  
Vertical Profiles ◽  
Angstrom Exponent ◽  
Ångström Exponent ◽  
Pollution Events ◽  
Ångstrom Exponent

Abstract. Characterizing vertical profiles of aerosol optical properties is important because relying on only the surface or column-integrated measurements cannot unambiguously constrain the radiative impacts of aerosol. This study presents series of vertical profiles of in situ measured multi-wavelength optical properties of aerosols during three pollution events from November to December 2016 over the Beijing region. For all pollution events, the clean periods (CPs) before pollution initialization showed a higher scattering Ångström exponent (SAE) and a smaller asymmetry parameter (g) with relatively uniform vertical structures. The heavy pollution periods (HPs) showed an increased particle size, causing these parameters to vary in the opposite way. During the transition periods (TPs), regional transport of aged aerosols at higher altitudes was found. The Aerosol Robotic Network (AERONET) aerosol optical depth (AOD) matched the in situ measurements within 10 %; however the AERONET absorption optical depth (AAOD) was 10 %–20 % higher than the in situ measurements, and this positive discrepancy increased to 30 % at shorter wavelengths. The absorption of brown carbon (BrC) was identified by the increased-absorption Ångström exponent (AAE), and the heating rate of black carbon (BC) and BrC was estimated by computing the spectral absorption coefficient and actinic flux calculated by a radiative transfer model. BC and BrC had a heating rate of up to 0.18 and 0.05 K h−1 in the planetary boundary layer (PBL), respectively, during the pollution period. The fraction of BrC absorption increased from 12 % to 40 % in the PBL from the CP to the HP. Notably, a higher contribution of BrC heating was found above the PBL under polluted conditions. This study paints a full picture of shortwave heating impacts of carbonaceous aerosols during different stages of pollution events and highlights the increased contribution of BrC absorption especially at higher altitudes during pollution.

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