| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1604804 | International Journal of Refractory Metals and Hard Materials | 2006 | 9 Pages |
The SIBOR® (Si–10B–2C) oxidation protective coating was applied onto molybdenum-, molybdenum—3 vol.% ZrO2 (zirconia)- and tungsten-samples by APS (= atmospheric plasma spraying) with a subsequent heat treatment.The coated samples were submitted to ramp oxidation tests with heating rates of 10 °C/h up to a temperature of 1450 °C with a subsequent dwell time of 24 h. This procedure simulates the heating up of a glass melting tank where SIBOR® coated parts are most frequently used.Some of the as coated samples and samples which were oxidized without any defect were immersed in various molten glasses to determine the dissolution behaviour of the SIBOR® substrate system. This simulates the situation when the glass melting tank is filled and operated with molten glass.SIBOR® proved to be an excellent oxidation protective coating for the molybdenum–zirconia-material and for TZM like for pure molybdenum, but not for tungsten, most probably because of the different thermal properties of the refractory metal oxides being formed. The coating was fairly good when dissolved by opal glass and slightly less when dissolved by soda lime glass. With borosilicate glass a much slower interaction was found. In all cases some discoloration and bubbles were found in the glasses after one week.
