Imperial College London

Professor WE (Bill) Lee FREng

Faculty of EngineeringInstitute for Security Science & Technology

Co-Director of Institute for Security Science and Technology



+44 (0)20 7594 6733w.e.lee Website




Ms Denise McGurk +44 (0)20 7594 8864




Central LibrarySouth Kensington Campus






BibTex format

author = {Al, Nasiri N and Patra, N and Jayaseelan, D and Lee, W},
doi = {10.1016/j.ceramint.2017.02.123},
journal = {Ceramics International},
pages = {7393--7400},
title = {Water vapour corrosion of rare earth monosilicates for environmental barrier coatings application},
url = {},
volume = {43},
year = {2017}

RIS format (EndNote, RefMan)

AB - Water vapour corrosion resistance of five rare earth monosilicates Y2SiO5, Gd2SiO5, Er2SiO5, Yb2SiO5, and Lu2SiO5 was investigated during testing at 1350 °C for up to 166 h in static air with 90% water vapour. Four of the RE-silicates showed little weight gain (0.859 mg cm−2) after 166 h of exposure. Prior to testing the microstructure consists of equiaxed grains of 4- 7±0.4 µm. XRD analysis showed that after 50 h exposure to water vapour corrosion Y, Er, Yb and Lu-silicates had both mono and disilicates present on their surfaces as a result of the reaction between monosilicate and water vapour to form disilicate, while Gd-silicate has converted completely to G4.67Si3O13 making it less stable for environmental barrier coating application. The microstructures of corroded Y, Er, Yb and Lu-silicates contain ridges and cracks, while that of Gd-silicate contains rounded grains suggesting melting along with striped contract grains.
AU - Al,Nasiri N
AU - Patra,N
AU - Jayaseelan,D
AU - Lee,W
DO - 10.1016/j.ceramint.2017.02.123
EP - 7400
PY - 2017///
SN - 1873-3956
SP - 7393
TI - Water vapour corrosion of rare earth monosilicates for environmental barrier coatings application
T2 - Ceramics International
UR -
UR -
VL - 43
ER -