# US 2014/0194272 A1 · Method of treating a preceramic material

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- Number: US 2014/0194272 A1
- Document ID: US20140194272A1
- Status: Published application
- Kind: A1
- Application number: 14/203,697
- Filed: 2014-03-11
- Published: 2014-07-10
- Earliest claimed: 2012-01-18
- Assignees: United Technologies Corporation
- Applicants: United Technologies Corporation
- Inventors: Wayde R. Schmidt
- Web page: https://patentgrep.com/patent/US20140194272A1

## CPC

- C04B 35/62645: {Thermal treatment of powders or mixtures thereof other than sintering}
- C04B 35/013: {containing carbon (C04B35/103 takes precedence)}
- C04B 35/5156: {based on rare earth compounds}
- C04B 35/56: based on carbides {or oxycarbides (containing free metal binder C22C29/00)}
- C04B 35/5603: {with a well-defined oxygen content, e.g. oxycarbides}
- C04B 35/5607: {based on refractory metal carbides}
- C04B 35/563: based on boron carbide
- C04B 35/571: obtained from {Si-containing} polymer precursors {or organosilicon monomers}
- C08G 77/56: Boron-containing linkages
- C08G 77/58: Metal-containing linkages
- C04B 2235/3205: Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B 2235/3217: Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
- C04B 2235/3224: Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
- C04B 2235/3231: Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B 2235/3409: Boron oxide, borates, boric acids, or oxide forming salts thereof, e.g. borax
- C04B 2235/3895: Non-oxides with a defined oxygen content, e.g. SiOC, TiON
- C04B 2235/483: Si-containing organic compounds, e.g. silicone resins, (poly)silanes, (poly)siloxanes or (poly)silazanes
- C08G 77/50: by carbon linkages
- C08G 77/60: in which all the silicon atoms are connected by linkages other than oxygen atoms
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

## Abstract

A method of treating a preceramic material includes providing a preceramic polycarbosilane or polycarbosiloxane material that includes a moiety Si—O—M, where Si is silicon, O is oxygen and M is at least one metal, and thermally converting the preceramic polycarbosilane or polycarbosiloxane that includes the moiety Si—O—M material into a ceramic material.

## Claims

### Claim 1

A method of treating a preceramic material, the method comprising:
providing a preceramic polycarbosilane or polycarbosiloxane material that includes a moiety Si—O—M, where Si is silicon, O is oxygen and M is at least one metal; and
thermally converting the preceramic polycarbosilane or polycarbosiloxane that includes the moiety Si—O—M material into a ceramic material.

### Claim 2 (depends on 1)

The method as recited in claim 1, wherein thermally converting the preceramic polycarbosilane or polycarbosiloxane material produces a ceramic material having a composition SiOxMzCy, wherein x<2, y>0 and z<1 and x and z are non-zero.

### Claim 3 (depends on 1)

The method as recited in claim 1, wherein the at least one metal is selected from the group consisting of aluminum, boron, alkaline earth metals, transition metals, refractory metals, rare earth metals and combinations thereof.

### Claim 4 (depends on 1)

The method as recited in claim 1, wherein the at least one metal is selected from the group consisting of aluminum, boron and combinations thereof.

### Claim 5 (depends on 1)

The method as recited in claim 1, wherein the at least one metal is a transition metal selected from the group consisting of titanium, zirconium, hafnium, vanadium, chromium and combinations thereof.

### Claim 6 (depends on 1)

The method as recited in claim 1, wherein the at least one metal is a refractory metal selected from the group consisting of niobium, tantalum, molybdenum, tungsten, rhenium and combinations thereof.

### Claim 7 (depends on 1)

The method as recited in claim 1, wherein the at least one metal is a rare earth metal selected from the group consisting of scandium, ytterbium, gadolinium, yttrium, lanthanum, neodymium, dysprosium, lutetium and combinations thereof.

### Claim 8 (depends on 1)

The method as recited in claim 1, wherein the at least one metal is an alkaline earth metal selected from the group consisting of barium, strontium, calcium, magnesium, and combinations thereof.

### Claim 9 (depends on 1)

The method as recited in claim 1, wherein the at least one metal includes aluminum.

### Claim 10 (depends on 1)

The method as recited in claim 1, wherein the ceramic material from the thermal converting includes 0.5-20 at. % of the at least one metal.

### Claim 11 (depends on 1)

The method as recited in claim 1, wherein the ceramic material from the thermal converting includes 1-10 at. % of the at least one metal.

### Claim 12 (depends on 1)

The method as recited in claim 1, further comprising crushing the ceramic material from the thermal converting to produce a particulate material.

### Claim 13 (depends on 12)

The method as recited in claim 12, further comprising thermally treating the particulate material in an inert environment.

### Claim 14 (depends on 12)

The method as recited in claim 12, further comprising thermally treating the particulate material in an oxidizing environment.