Densification and Properties of ZrB2-based Ceramics for Ultra-high Temperature Applications

2012 ◽  
Vol 29 (3) ◽  
pp. 273-278
Author(s):  
Seong-Won Kim ◽  
Hyung-Tae Kim ◽  
Kyung-Ja Kim ◽  
Won-Seon Seo
Keyword(s):  
High Temperature ◽  
Ultra High Temperature ◽  
Temperature Applications

scholarly journals Thermophysical Properties of Rh3X for Ultra-High Temperature Applications

2006 ◽  
Vol 50 (2) ◽  
pp. 69-76 ◽  
Author(s):  
By Yoshihiro Terada ◽  
Kenji Ohkubo ◽  
Seiji Miura ◽  
Mohri Tetsuo
Keyword(s):  
High Temperature ◽  
Thermophysical Properties ◽  
Ultra High Temperature ◽  
Temperature Applications

Stability of TaC precipitates in a Co–Re-based alloy being developed for ultra-high-temperature applications

2016 ◽  
Vol 49 (4) ◽  
pp. 1253-1265 ◽  
Author(s):  
Ralph Gilles ◽  
Debashis Mukherji ◽  
Lukas Karge ◽  
Pavel Strunz ◽  
Premysl Beran ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperatures ◽  
Gas Turbines ◽  
Volume Fraction ◽  
Turbine Blades ◽  
Alloy Development ◽  
Carbide Phases ◽  
Ultra High Temperature ◽  
Temperature Applications

Co–Re alloys are being developed for ultra-high-temperature applications to supplement Ni-based superalloys in future gas turbines. The main goal of the alloy development is to increase the maximum service temperature of the alloy beyond 1473 K,i.e.at least 100 K more than the present single-crystal Ni-based superalloy turbine blades. Co–Re alloys are strengthened by carbide phases, particularly the monocarbide of Ta. The binary TaC phase is stable at very high temperatures, much greater than the melting temperature of superalloys and Co–Re alloys. However, its stability within the Co–Re–Cr system has never been studied systematically. In this study an alloy with the composition Co–17Re–23Cr–1.2Ta–2.6C was investigated using complementary methods of small-angle neutron scattering (SANS), scanning electron microscopy, X-ray diffraction and neutron diffraction. Samples heat treated externally and samples heatedin situduring diffraction experiments exhibited stable TaC precipitates at temperatures up to 1573 K. The size and volume fraction of fine TaC precipitates (up to 100 nm) were characterized at high temperatures within situSANS measurements. Moreover, SANS was used to monitor precipitate formation during cooling from high temperatures. When the alloy is heated the matrix undergoes an allotropic phase transformation from the ∊ phase (hexagonal close-packed) to the γ phase (face-centred cubic), and the influence on the strengthening TaC precipitates was also studied within situSANS. The results show that the TaC phase is stable and at these high temperatures the precipitates coarsen but still remain. This makes the TaC precipitates attractive and the Co–Re alloys a promising candidate for high-temperature application.

An assessment of ternary precipitation-strengthened Pt alloys for ultra-high temperature applications

2001 ◽  
Vol 301 (2) ◽  
pp. 167-179 ◽  
Author(s):  
P.J Hill ◽  
T Biggs ◽  
P Ellis ◽  
J Hohls ◽  
S Taylor ◽  
...  
Keyword(s):  
High Temperature ◽  
Pt Alloys ◽  
Ultra High Temperature ◽  
Temperature Applications

Ductile L12Rh3Ti intermetallics for ultra-high temperature applications

2002 ◽  
Vol 329-331 ◽  
pp. 486-491 ◽  
Author(s):  
S.M.L Sastry ◽  
R Mahapatra ◽  
A.W Davis
Keyword(s):  
High Temperature ◽  
Ultra High Temperature ◽  
Temperature Applications

Y2B3C2: A strain-stiffening ceramic for ultra-high temperature applications

2017 ◽  
Vol 43 (16) ◽  
pp. 14031-14036 ◽  
Author(s):  
Wei Sun ◽  
Fuzhi Dai ◽  
Huimin Xiang ◽  
Jiachen Liu ◽  
Yanchun Zhou
Keyword(s):  
High Temperature ◽  
Ultra High Temperature ◽  
Temperature Applications
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