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Publication numberUS1098794 A
Publication typeGrant
Publication dateJun 2, 1914
Filing dateOct 29, 1912
Priority dateOct 29, 1912
Publication numberUS 1098794 A, US 1098794A, US-A-1098794, US1098794 A, US1098794A
InventorsSamuel H Fleming
Original AssigneeNat Carbon Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Article with protective coating.
US 1098794 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

- wit ,XR 190989794- SR UNITED s'rarns SAMUEL H. FLEMING, or CLEVELAND,


Parana orrron.



1,098,794. Specification of No Drawing.

ings forele cjrodes, resistors, furnace bricks and siniilar, articles;

The object of the invention is to produce a hard adhesive, non-porous coating that will stand the high temperatures attained in an electric or other-furnace without burning, or underging other deleterious chemical changes. The manner in which this is accomplished will be given in the accompanying description.

Titanium nitrid is a stable compound even at very high temperatures. It is nonporous, difiicult to break, and is very hard,

'so that it forms an efficient covering for articles of.-carb o n or othgr refractorygmagter ah as it prevent? tlie air or other furnace gases from reaching the carbon or other material to combine therewith.

To form the covering for an article a mix is made of some titanium compound, such as rutile for example, and a suitable binder and this is applied to the surface of the article by any means. The mix may be forced around the article at the same time that the latter is forced, in a manner similar to known process for putting thin shells around arc light electrodes, or it may be ressed on. After the article is coated atitanium compound such as rutile. it is baked at a high temperature in the presence of nitrogen. Titanium has a high affinity for nitrogen and the two readily combine to form the nitrid. By this means 'the coating of titanium oxid or other compound is converted into titanium nitrid.

In some cases it may be desirable to have the article provided with anfixtfilllq i fl. coahangl anjnterior'carbid coat, as the latter would servehs"'iiieansfi'ofinore firmly unite the former to the carbon. Titanium carbid wets the carbon and enters the pores of its exterior surface, so that the union with the carbon is practically perfect.

Letters Patent Patented June 2, 1914.

Application filed October 29, 1912. Serial No. 728,362.

Titanium carbid itself is a poor coating for articles subject to a high temperature in the presence of air, as it readily burns. However, if the coat of titanium carbid is l surrounded by a layer of titanium 'nitrid i it will be protected from the air and will not burn. One of the ways in which these two coats maybe applied to the article is x;

to apply a mix containing titanium and carbon to the article as previously described 5 r and then heat the article with the exclusion of air or nitrogen and thus form titanium carbid from the union of the titanium with the carbon. After the coating of carbid is formed the article is heated in the presence of air or other nitrogen supply and part or all of the titanium carbid is converted into the nitrid. The process can be stopped before the entire coat of carbid is transformed into the nitrid, if an inner coat of titanium carbid is desired.

lVhile I prefer to apply the nitrid coating in the way previously described, I may use another method for forming the coating. The article itself may consist of carbon mixed with rutilc or other titanium compound in the desired proportions. lVhen this is heated the outer surface of the electrodes will be converted to titanium carbid. The carbid coating may be later entirely or partially converted into the nitrid by heating in the presence of nitrogen as previously described, or the article may be first heated in an atmosphere of. nitrogen so that a coating of the nitrld is directly formed.

Having described my invention what I claim is:

l. A refractory article having a coating of titanium nitrid.

A refractory article having one coating of titanium carbid and a second superimposed coating of titanium nitrid.

3. A carbonaceous article, the outer portions of which contain titanium nitrid.

4. The process of forming a coating on an article which consists in applying a layer of rutile and then heating the article in the presence of nitrogen.

5. The process of forming a coating on an article which consists in applying a layer of rutile and carbon, heating with the exduslon of 2111' to change the layer In testimony whereof I have hereunto to tlt-amum carbld, and then heatmg m an slgned my name.

atmosphere of nitrogeq -to form, titanium S AMUEL H FLEMING nitrid. 5 6. A furnace olectroglg conslstmg of car- \Vitnesses:

bon andhavlng'a coatlng of tltanlum nit-rid I. J. ADAMS,

to protect it from oxidation. H. G. GROVER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0."

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2597963 *Sep 10, 1947May 27, 1952Union Carbide & Carbon CorpFluid impervious carbon article and method of making same
US2597964 *Nov 9, 1951May 27, 1952Union Carbide & Carbon CorpFluid impervious carbon article and method of making same
US2636856 *Jun 29, 1948Apr 28, 1953Mallory & Co Inc P RElectrode for electrochemical oxidation
US2836514 *Nov 15, 1954May 27, 1958Metallgesellschaft AgHard surface coated gear member
US2839426 *Jan 21, 1954Jun 17, 1958Union Carbide CorpMethod of coating carbonaceous articles with silicon nitride
US2864731 *Jul 13, 1956Dec 16, 1958David H GurinskyForming protective films on metal
US2880552 *Aug 16, 1954Apr 7, 1959Owens Corning Fiberglass CorpHeat treatment of metal-coated glass fibers
US2926111 *Apr 3, 1958Feb 23, 1960Donald G SchweitzerMethod of forming a protective coating on ferrous metal surfaces
US2960642 *Apr 17, 1958Nov 15, 1960Quartz & Silice S ADielectric films and capacitors employing the same
US2990351 *Mar 1, 1948Jun 27, 1961Manuel C SanzNuclear reactor element
US3041260 *Dec 31, 1958Jun 26, 1962Walter V GoeddelNuclear fuel material
US3073717 *Dec 31, 1958Jan 15, 1963Gerald L AllenCoated carbon element for use in nuclear reactors and the process of making the element
US3131089 *Jan 25, 1961Apr 28, 1964Union Carbide CorpCarbon article coated with boron carbide and boron nitride, and process of making the same
US3151852 *Jul 9, 1958Oct 6, 1964Chrysler CorpProcess for obtaining metal carbide coatings on base materials and metal carbide structures produced thereby
US4358506 *Oct 24, 1980Nov 9, 1982Josef IntraterMetal and carbon composites thereof
US4396677 *Mar 11, 1981Aug 2, 1983Josef IntraterMetal, carbon, carbide and other composites thereof
US5254359 *Jun 14, 1991Oct 19, 1993Air Products And Chemicals, Inc.Method of forming titanium nitride coatings on carbon/graphite substrates by electric arc thermal spray process using titanium feed wire and nitrogen as the atomizing gas
US5304417 *Jun 2, 1989Apr 19, 1994Air Products And Chemicals, Inc.Graphite/carbon articles for elevated temperature service and method of manufacture
US5352523 *May 8, 1992Oct 4, 1994Air Products And Chemicals, Inc.Graphite/carbon articles for elevated temperature service and method of manufacture
EP0067252A1 *Jun 8, 1981Dec 22, 1982Advanced Technology Inc.Metal, carbon, carbide and other compositions thereof, alloys and methods for preparing same
U.S. Classification428/367, 428/379, 373/90, 427/377, 428/408, 427/123, 427/122, 427/113
International ClassificationC04B41/89, C04B41/52
Cooperative ClassificationC04B41/009, C04B41/52, C04B41/89
European ClassificationC04B41/00V, C04B41/89, C04B41/52