Sealing of cracks in the rhenium coating on C/C composites by alloying with cobalt

Add time:08/15/2019    Source:sciencedirect.com

Thermal stress cracks of the rhenium coating on C/C composites have severely limited its applications. In the present work, rhenium coatings were prepared on C/C composites by chemical vapor deposition (CVD) and modified by alloying with cobalt. The results showed that the as-prepared rhenium coating consisted of monolayer columnar grains with significantly < 002 > preferred orientation, which led to lower ductility and mechanical strength in the coating. After modification, the cracks of the rhenium coating were sealed by rhenium–cobalt alloys and the ductility and mechanical strength of the coating had a remarkable improvement. Moreover, tensile and shear bond strength of the as-modified rhenium coatings with C/C substrates had a considerable reduction. The cobalt-modified rhenium coatings free of cracks were acquired on C/C composites ultimately.

We also recommend Trading Suppliers and Manufacturers of RHENIUM BORIDE (cas 12355-99-6). Pls Click Website Link as below: cas 12355-99-6 suppliers

Prev:Wear and corrosion behaviour of Inconel 718 laser surface alloyed with rhenium
Next:Characterization of borides in Co–Re–Cr-based high-temperature alloys)