TY  - JOUR
AU  - Palaniyappan, Saravanan
AU  - Trautmann, Maik
AU  - Mao, Yiran
AU  - Riesch, Johann
AU  - Gowda, Parikshith
AU  - Rudolph, Nick
AU  - Coenen, Jan Willem
AU  - Neu, Rudolf
AU  - Wagner, Guntram
TI  - Yttria-Coated Tungsten Fibers for Use in Tungsten Fiber-Reinforced Composites: A Comparative Study on PVD vs. CVD Routes
JO  - Coatings
VL  - 11
IS  - 9
SN  - 2079-6412
CY  - Basel
PB  - MDPI
M1  - FZJ-2021-05635
SP  - 1128 -
PY  - 2021
AB  - Tungsten fiber-reinforced tungsten (Wf/W) composites are being developed to improve the intrinsic brittleness of tungsten. In these composites, engineered fiber/matrix interfaces are crucial in order to realize toughening mechanisms. For such a purpose, yttria (Y2O3), being one of the suitable interface materials, could be realized through different coating techniques. In this study, the deposition of thin films of yttria on a 150 µm tungsten wire by physical and chemical vapor deposition (PVD and CVD) techniques is comparatively investigated. Although fabrication of yttria is feasible through both CVD and PVD routes, certain coating conditions such as temperature, growth rate, oxidation of Wf, etc., decide the qualitative nature of a coating to a particular extent. In the case of PVD, the oxidation of Wf is highly reduced compared to the WO3 formation in high-temperature CVD coating processes. Yttria-coated tungsten fibers are examined comprehensively to characterize their microstructure, phase, and chemical composition using SEM, XRD, and Raman spectroscopy techniques, respectively
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000699439000001
DO  - DOI:10.3390/coatings11091128
UR  - https://juser.fz-juelich.de/record/904065
ER  -