Method of treating a preceramic material
A method of treating a preceramic material includes modifying a moiety Si—O—R of a polycarbosilane material with at least one metal (M), where Si is silicon, O is oxygen and R includes an alkyl or aryl moiety, by reaction to substitute R with M to produce a preceramic polycarbosilane or polycarbosiloxane material that includes a moiety Si—O-M.
1. A method of treating a preceramic material, the method comprising:
modifying a moiety Si—O—R of a polycarbosilane or polycarbosiloxane material with at least one metal (M), where Si is silicon, O is oxygen and R includes an alkyl or aryl moiety, by reaction to substitute R with M to produce a preceramic polycarbosilane or polycarbosiloxane material that includes a moiety Si—O-M.
2. The method as recited in claim 1 , wherein the reaction includes at least one of a hydrolysis and a condensation reaction.
3. The method as recited in claim 1 , wherein the polycarbosilane or polycarbosiloxane material is alkoxy-modified polycarbosilane or polycarbosiloxane.
4. The method as recited in claim 1 , including providing the at least one metal (M) in a metal alkoxy or aryloxy compound and reacting the metal alkoxy or aryloxy compound with the moiety Si—O—R to substitute R with M.
5. The method as recited in claim 1 , including providing the at least one metal (M) in a metal alkoxy or aryloxy compound and dissolving the metal alkoxy or aryloxy compound and the polycarbosilane or polycarbosiloxane material in a solvent.
6. The method as recited in claim 5 , wherein the solvent is selected from a group consisting of methanol, hexane, tetrahydrofuran, 2-methyl-1-propanol and combinations thereof.
7. The method as recited in claim 5 , wherein the solvent is 2-methyl-1-propanol.
8. The method as recited in claim 1 , including providing the at least one metal (M) in a metal alkoxy or aryloxy compound, dissolving the metal alkoxy or aryloxy compound and the polycarbosilane or polycarbosiloxane material in a solvent to form a solution and catalyzing the reaction or reactions in the solution using an acid.
9. The method as recited in claim 8 , including, after the reaction or reactions, removing the solvent to produce a substantially dry solid reaction product comprising the preceramic polycarbosilane or polycarbosiloxane material that includes the moiety Si—O-M.
10. The method as recited in claim 1 , including thermally converting the preceramic polycarbosilane or polycarbosiloxane material that includes the moiety Si—O-M into a ceramic material.
11. The method as recited in claim 1 , including mixing the preceramic polycarbosilane or polycarbosiloxane material that includes the moiety Si—O-M with a different preceramic polymer material.
12. The method as recited in claim 1 , wherein the at least one metal (M) is selected from a group consisting of aluminum, boron, alkaline earth metals, transition metals, refractory metals, rare earth metals and combinations thereof.
13. The method as recited in claim 1 , wherein the at least one metal is selected from a group consisting of aluminum, boron and combinations thereof.
14. The method as recited in claim 1 , wherein the at least one metal is a transition metal selected from a group consisting of titanium, zirconium, hafnium, vanadium, chromium and combinations thereof.
15. The method as recited in claim 1 , wherein the at least one metal is a refractory metal selected from a group consisting of niobium, tantalum, molybdenum, tungsten, rhenium and combinations thereof.
16. The method as recited in claim 1 , wherein the at least one metal is a rare earth metal selected from a group consisting of scandium, ytterbium, gadolinium, yttrium, lanthanum, neodymium, dysprosium, lutetium and combinations thereof.
17. The method as recited in claim 1 , wherein the at least one metal is an alkaline earth metal selected from a group consisting of barium, strontium, calcium, magnesium, and combinations thereof.