Coated graphite members and process for producing the same

Details Coated graphite members and process for producing the same Coated graphite members and process for producing the same

1972-07-24

1976-07-13

Rosdol, Leon D.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

313330, 313345, 44 10F, 44 10J, 428457, 428408, 427 57, 427316, 427322, B44d 120, C23c 1100

Patent

active

039691314

ABSTRACT:
Composite members comprising a substrate of fine grained istropic graphite having a density of at least about 1.75 gr/cc, a coefficient of thermal expansion of from about 7.5 to 8.3 inch per inch per .degree.C.times.10.sup.-.sup.6, in which the grains are of a maximum particle size of less than 0.001 inch, and characterized by a relatively uniform distribution of many interconnected fine pores of an average diameter of about 5 microns and less, the pores extending to the surface of the member, and a selected refractory meatal carbide coating firmly bonded to and conforming to the surface of the isotropic graphite member, the refractory metal carbide coating and the isotropic graphite having closely matching coefficients of thermal expansion. Such coated members are particularly well suited for use as anodes and other electrical members, particularly for use at elevated temperatures. Rotating anodes for X-ray tubes comprising such members are an application. Processes for manufacture of such metal carbide coated isotropic graphite members are also disclosed.

REFERENCES:
patent: 2978358 (1961-04-01), Campbell
patent: 3037142 (1962-05-01), Griffoul
patent: 3243636 (1966-03-01), Nineuil
patent: 3393085 (1968-07-01), Howard
patent: 3459504 (1969-08-01), Bracken
patent: 3471314 (1969-10-01), Beatty
patent: 3539859 (1970-11-01), Bougle
patent: 3646380 (1972-02-01), Hartl
patent: 3649355 (1971-03-01), Hennig
patent: 3731128 (1973-05-01), Haberrecker
patent: 3751702 (1973-08-01), Dietz

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