13-04-2017 дата публикации
Номер: US20170101539A1
Принадлежит:
A method includes masking at least one hole of an article with a paste, wherein the hole opens onto a surface of the article, applying a coating to the surface of the article, and removing the paste including contacting the paste with a water containing liquid/environment to dissolve or re-disperse the paste, leaving at least one open hole in the surface of the coated article. The paste includes about 20-80 wt % of a filler material, about 0.5-20 wt % of a hydrogen phosphate compound, about 0.5-15 wt % of a polyhydroxy compound and about 5-25 wt % of water. The filler material has an average particle size in a range of about 0.1-100 microns, and includes a first material which includes alkali metal doped alumina, zirconium oxide, titanium oxide or a combination thereof and a second material which includes a silicate. A weight ratio between the first and second materials is in a range of about 1-10. 1. A method comprising:masking, with a water-soluble plug paste, at least one hole of an article, wherein the hole opens onto a surface of the article;applying at least one coating to the surface of the article; andremoving the paste comprising contacting the paste with water, a water containing liquid or water containing environment to dissolve or re-disperse the paste, leaving at least one open hole in the surface of the coated article, 'from about 20 weight percent to about 80 weight percent of a high temperature resistant filler material comprising a first material and a second material and having an average particle size in a range from about 0.1 micron to about 100 microns, wherein the first material comprises alkali metal doped alumina, zirconium oxide, titanium oxide, or a combination thereof, the second material comprises a silicate, and a weight ratio between the first material and the second material is in a range from about 1 to about 10;', 'wherein the water-soluble plug paste comprisesfrom about 0.5 weight percent to about 20 weight percent of a hydrogen ...
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