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Spray coating processing SPRAY PROCESSING
Graphite boat dish coated with zirconia
The zirconia coating on the surface of the graphite boat dish was processed using a plasma spraying device, and its surface roughness has been improved.
石墨舟皿喷涂氧化锆
石墨舟皿
氧化锆
Product Description
Graphite boat dish coated with zirconia
A groove-type graphite boat, comprising several strips with two opposing groove surfaces and bottom support protrusions. W The structure features two opposing inclined grooves, a bottom surface, an upper end face, inner side surfaces, outer side surfaces, and a stop shoulder opposite the upper end face. Specifically, at least one venting groove is provided on each of the two opposing groove surfaces and on the upper surface; furthermore, at the intersection between the bottom support protrusion and each of the two opposing groove surfaces, there is a corner-protecting groove.
Thin graphite boat dish, featuring multiple carrier rod slots arranged on one side. W The boat-shaped body, shims, and locating pins with a certain degree of taper—where the boat-shaped body features parallel rod-holding grooves. W The two ends are each equipped with grooves. The protruding platform at the bottom of the shim fits into these grooves, and the locating pin passes through the locating hole in the middle of the groove and the locating hole in the middle of the protruding platform at the bottom of the shim.
Zirconium oxide: It is white in color and has a melting point of... 2860℃, used for the preparation of protective and thermal insulation coatings for high-temperature gas erosion-resistant parts.
Graphite plate tray Graphite boat dish Electronic ceramic firing plate Plasma-Oxidized Zirconia Ceramic High-Temperature-Resistant Coating Graphite plate tray for vacuum furnace sintering furnace
The zirconia coating on the surface of the graphite boat dish was processed using plasma spraying equipment, and its surface roughness was improved.
If the zirconia coating on the surface of the graphite boat dish is too thick, it can cause the sintered product to adhere to the coating, leading to product deformation and compromising sintering quality. Our company has therefore implemented process improvements:
1. Increase the yttrium oxide content in the zirconia powder.
2. Use zirconia (ZrO2) powder with a finer particle size.
3. Adjust plasma spraying process parameters
By increasing the current plasma spraying voltage, appropriately reducing the spraying current, lowering the powder feed rate, and decreasing the powder feed gas pressure—so that the powder can fully melt and atomize—we can improve the smoothness of the coating. Specific process parameters will need to be determined through trial and error based on samples and materials your company provides to our company for testing.
4. Before spraying, sandblasting for surface roughening uses a finer grade of silica sand.
The sandblasting roughening treatment performed prior to spraying uses a finer grade of silica sand, which can result in a smooth surface on the substrate before coating and a relatively smooth surface on the underlying plasma-sprayed layer as well.
Next: Undertaking various types of tungsten carbide spraying and ceramic coating processing.
Online Quotation
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Spraying equipment SPRAY EQUIPMENT
Graphite boat dish coated with zirconia
The zirconia coating on the surface of the graphite boat dish was processed using a plasma spraying device, and its surface roughness has been improved.
石墨舟皿喷涂氧化锆
石墨舟皿
氧化锆
Product Description
Graphite boat dish coated with zirconia
A groove-type graphite boat, comprising several strips with two opposing groove surfaces and bottom support protrusions. W The structure features two opposing inclined grooves, a bottom surface, an upper end face, inner side surfaces, outer side surfaces, and a stop shoulder opposite the upper end face. Specifically, at least one venting groove is provided on each of the two opposing groove surfaces and on the upper surface; furthermore, at the intersection between the bottom support protrusion and each of the two opposing groove surfaces, there is a corner-protecting groove.
Thin graphite boat dish, featuring multiple carrier rod slots arranged on one side. W The boat-shaped body, shims, and locating pins with a certain degree of taper—where the boat-shaped body features parallel rod-holding grooves. W The two ends are each equipped with grooves. The protruding platform at the bottom of the shim fits into these grooves, and the locating pin passes through the locating hole in the middle of the groove and the locating hole in the middle of the protruding platform at the bottom of the shim.
Zirconium oxide: It is white in color and has a melting point of... 2860℃, used for the preparation of protective and thermal insulation coatings for high-temperature gas erosion-resistant parts.
Graphite plate tray Graphite boat dish Electronic ceramic firing plate Plasma-Oxidized Zirconia Ceramic High-Temperature-Resistant Coating Graphite plate tray for vacuum furnace sintering furnace
The zirconia coating on the surface of the graphite boat dish was processed using plasma spraying equipment, and its surface roughness was improved.
If the zirconia coating on the surface of the graphite boat dish is too thick, it can cause the sintered product to adhere to the coating, leading to product deformation and compromising sintering quality. Our company has therefore implemented process improvements:
1. Increase the yttrium oxide content in the zirconia powder.
2. Use zirconia (ZrO2) powder with a finer particle size.
3. Adjust plasma spraying process parameters
By increasing the current plasma spraying voltage, appropriately reducing the spraying current, lowering the powder feed rate, and decreasing the powder feed gas pressure—so that the powder can fully melt and atomize—we can improve the smoothness of the coating. Specific process parameters will need to be determined through trial and error based on samples and materials your company provides to our company for testing.
4. Before spraying, sandblasting for surface roughening uses a finer grade of silica sand.
The sandblasting roughening treatment performed prior to spraying uses a finer grade of silica sand, which can result in a smooth surface on the substrate before coating and a relatively smooth surface on the underlying plasma-sprayed layer as well.
Next: Undertaking various types of tungsten carbide spraying and ceramic coating processing.
Online Quotation
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