Calculation of thermal conductivity of gypsum plasterboards at ambient and elevated temperature

2009 ◽  
pp. n/a-n/a ◽  
Author(s):  
A. C. J. de Korte ◽  
H. J. H. Brouwers
Keyword(s):  
Thermal Conductivity ◽  
Elevated Temperature

Effects of Mo and Ni on the thermal conductivity of compacted graphite iron at elevated temperature

2019 ◽  
Vol 32 (5-6) ◽  
pp. 243-251 ◽  
Author(s):  
Dongmei Xu ◽  
Guiquan Wang ◽  
Xiang Chen ◽  
Yanxiang Li ◽  
Yuan Liu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Elevated Temperature ◽  
Compacted Graphite Iron ◽  
Compacted Graphite

Thermal conductivity of irradiated graphite at an elevated temperature

1977 ◽  
Vol 43 (2) ◽  
pp. 732-733 ◽  
Author(s):  
A. I. Lutkov ◽  
Yu. S. Virgil'ev
Keyword(s):  
Thermal Conductivity ◽  
Elevated Temperature ◽  
Irradiated Graphite

The Effect of Structure on the Thermal Conductivity of Plasma Sprayed Alumina

1983 ◽  
Vol 30 ◽  
Author(s):  
H.C. Fiedler
Keyword(s):  
Thermal Conductivity ◽  
Elevated Temperature ◽  
Alpha Phase ◽  
Gamma Phase ◽  
Deposition Surface ◽  
The Poor ◽  
Plasma Sprayed ◽  
Alpha Alumina ◽  
Effect Of Structure

ABSTRACTPlasma sprayed deposits of alumina are normally of the metastable gamma phase, which transforms to alpha upon heating to an elevated temperature. The poor thermal conductivity of gamma phase is improved by transforming to alpha, but the improvement is restricted by the fragmented nature of the structure, a consequence of alpha being a denser phase than gamma.Alpha phase has been reported to form when deposits are made on preheated substrates. It was found that reducing the distance between gun and deposition surface, thereby raising the temperature of the latter, resulted in transforming gamma to alpha, and as the temperature continued to rise, alpha formed directly from the liquid. The thermal conductivity of alpha formed directly from the liquid is 0.27 Watt/cm K at 323 K, which approaches the thermal conductivity given for 99.5% pure, 98% dense, polycrystalline alpha alumina.

Thermal Conductivity and Tensile Property of Mg-Zn-Y Casting Alloys with Long-Period Stacking Ordered Phase

2016 ◽  
Vol 879 ◽  
pp. 801-806
Author(s):  
Yuichi Ienaga
Keyword(s):  
Thermal Conductivity ◽  
Elevated Temperature ◽  
Engine Performance ◽  
Aluminum Casting ◽  
Magnesium Matrix ◽  
Lpso Phase ◽  
Long Period ◽  
Casting Alloys ◽  
Important Study ◽  
Engine Components

The Mg-Zn-Y alloy with long-period stacking ordered (LPSO) phase is known as attractive for automotive lightening engine components with strength at elevated temperature. On the other hand, it is considered that the thermal conductivity of magnesium alloys is lower than that of commercial aluminum alloys. Low thermal conductivity causes engine performance degradation. However, there is little study on the thermal conductivity of Mg-Zn-Y casting alloys. It is important study when we consider the application of high-temperature parts for engine components. Then we developed the Mg-Zn-Y casting alloys with strength at elevated temperature and good thermal conductivity. Our developed alloys have the fine LPSO phase with a net-like structure for higher strength and the pure magnesium matrix for better thermal conductivity. It is important that there is little or no solute element in the magnesium matrix for thermal conductivity. We accomplished these two good characteristics at the same time by optimizing the amount of zinc and yttrium contained in the Mg-Zn-Y casting alloys. Mg96Zn2Y2 die-casting alloy had a good thermal conductivity of over 100 Wm-1K-1 at 473 K. This was almost identical to the thermal conductivity of heat-resistant aluminum casting alloys for conventional engine components.

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