Thermal Stability of W‐xRe/TiC/SiC Systems = 0, 5 and 25 at % Re) at High Temperature

Abstract

To ensure the integrity and sustainability of high‐temperature applications, the development of protective materials is actually one of the major challenge in materials science. In our study, we examined the effect of a TiC film interlayered between W‐xRe (x = 0, 5 or 25 at % Re) and SiC. The protection given by TiC layer was considered in the 1573–1873 K temperature range and for TiC thicknesses up to about 100 μm.

Solid‐State Reactions of SiC/W–25Re Alloy and Thermal Stability of SiC/Ti/W–25Re Alloy under High‐Temperature Annealing

“…Annealing experiment was conducted with the designed functionally graded materials which embedding the Ti layer between SiC and W-25Re alloy were annealed using the same experimental conditions. Although there were some previous researches with respect to the diffusion kinetics of carbon in TiC 1 À x , [26] there were not many reported research regarding the Ti layer as embedded between SiC and W-25Re alloy. While compared to the original interface, thicknesses of both reaction layer and sigma phase were significantly decreased due to the limitation of diffusion of Si atom.…”

Phase‐Control Enabled Superior Mechanical and Electrical Properties of Nanocrystalline Tungsten‐Molybdenum Thin Films

“…Tungsten (W), which is considered as a metal of superlatives, exhibits excellent electrical, mechanical and physical properties, such as high melting point ( T m = 3422 °C), high erosion resistance, reduced long‐term activation, and radiation tolerance, which makes this material of particular interest for many scientific and technological applications . On the other hand, it has been widely demonstrated in the literature that the properties and phenomena of W and W‐based materials can be controlled by tailoring the composition and processing conditions . W exhibits cubic ( bcc ) phase ( α ‐W) and metastable A15 phase ( β ‐W) with quite different physical, chemical, electronic, and mechanical properties.…”

“…Tungsten has been serving the electronics, photonics, electro‐optics, mechanics, and electro‐mechanical industries for several decades. In addition to very high melting point of all metals, W also exhibits excellent high temperature strength and high creep resistance, which allow the material to be used in extreme environment mechanical applications . In X‐ray technology, W films are used as absorption masks in X‐ray lithography or diffracting layers in X‐ray mirrors .…”

“…Kim et al presented a new class of gamma radiation shielding materials consisting the nano‐W dispersed in polymer nanocomposites whose radiation attenuation is greatly enhanced compared to their micro‐W containing counterparts . However, it must be noted that the properties and phenomena of pure W and W‐based alloys, as well as composite materials, depend on the final composition and processing conditions . Furthermore, manipulating the phase and microstructure at the nanoscale dimensions can provide excellent opportunities to further properties improvement .…”

“…However, it must be noted that the properties and phenomena of pure W and W‐based alloys, as well as composite materials, depend on the final composition and processing conditions . Furthermore, manipulating the phase and microstructure at the nanoscale dimensions can provide excellent opportunities to further properties improvement . Intrinsic or W‐based multi‐component alloy films for the aforementioned technologies can be prepared using a wide variety of physical and chemical deposition methods.…”