| 摘要 |
<p>A flame-spraying repair material which exhibits a high crystallinity just after the flame spraying and is effective in forming a dense repair layer by flame spraying under wide flame-spraying conditions. This material comprises, in terms of oxide, at least 89 wt.% of SiO2, and 2.0 (exclusive) to 4.0 wt.% of Na2O and/or 0.2 (exclusive) to 4.0 wt.% of Li2O, and exhibiting a crystallinity of 80 % or above and a compression strength of 200 kgf/cm2 or above after the flame spraying. Another flame-spraying repair material which exhibits a high crystallinity just after the flame spraying and is effective in forming a dense repair layer by flame spraying in spite of its containing more or less CaO. This material comprises, in terms of oxide, at least 89 wt.% of SiO2, 2.0 (exclusive) to 5.0 wt.% of CaO, 0.5 to 4.0 wt.% of Na2O and/or 0.2 (exclusive) to 4.0 wt.% of Li2O, and at most 1.0 wt.% of Al2O3, and exhibiting a crystallinity of 80 % or above and a compression strength of 200 kgf/cm2 or above after the flame spraying.</p> |
