Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By mechanically introducing gas into material
Patent
1979-11-14
1981-10-06
Ives, P.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
By mechanically introducing gas into material
264 60, 264 6, 264 7, 423440, 423345, 423346, 427249, 428408, 428446, 428448, 428698, F27B 914, C01B 3136
Patent
active
042935121
ABSTRACT:
In order to prevent a protective carbide layer on a graphitic molded article from splitting off under thermal stress, an external carbide layer is provided on a graphitic molded article having a graded content of silicon or zirconium (in the carbide state) that increases from near zero at the interior boundary of the layer to about 50 atomic percent at the exterior. Such a layer is produced either by dipping the graphitic molded article into melted silicon, dipping it into a succession of suspensions of carbon and either silicon or zirconium, with a greater silicon or zirconium content in each successive dip, the suspensions also including a binder resin, or by applying layers of a paste of carbon and either silicon or zirconium, also with some resin, each successive layer having a higher silicon or zirconium content. In the case of the successive dipping into suspensions, the article is dried after each dip and then heated to harden the binder, and in the case of application of successive paste layers, the binder is likewise hardened each time. In each case, the treatment terminates with heating to a coking temperature, followed by a rapid rise of temperature to a value at which silicon carbide or zirconium carbide will be formed, followed by cooling to room temperature.
REFERENCES:
patent: 2929741 (1960-03-01), Steinberg
patent: 2992127 (1961-07-01), Jones
patent: 3073717 (1963-01-01), Pyle et al.
patent: 3095316 (1963-06-01), Hartwig
patent: 3393084 (1968-07-01), Hartwig
patent: 3447952 (1969-06-01), Hertl
patent: 3786133 (1974-01-01), Chiu
patent: 3925577 (1975-12-01), Fatzer et al.
patent: 4188279 (1980-02-01), Yan
Dias Francisco J.
Luhleich Hartmut
Nauomidis Aristides
Nickel Hubertus
Pflaum Peter
Ives P.
Kernforschungsanlage Julich GmbH
LandOfFree
Making temperature-stable protectively coated graphite molded bo does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Making temperature-stable protectively coated graphite molded bo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Making temperature-stable protectively coated graphite molded bo will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1206298