http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2038013-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_dcd4fc7204591569731fe999a1a20783 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b73e76e18846b059a5c758965e202685 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_dfb3b82c049ccbfc7a23fdd13ad1b888 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2235-3895 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2235-486 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2235-77 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2235-785 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2235-5264 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B35-571 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B35-62281 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D01F9-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B35-571 |
| filingDate | 1991-03-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_25e6467308b3ea2e6fa6a5d30b5bc158 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f96d33eee22909d9fe072cea7ec430f8 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_883728288ede83d49c3eed67b6e4b114 |
| publicationDate | 1991-12-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2038013-A1 |
| titleOfInvention | Preparation of substantially polycrystalline silicon carbide fibers from methylpolydisilylazanes |
| abstract | PREPARATION OF SUBSTANTIALLY POLYCRYSTALLINE SILICON CARBIDE FIBERS FROM METHYLPOLYDISILYLAZANES ABSTRACT A process for the preparation of substantially polycrystalline silicon carbide fibers is provided. The fibers may be fabricated to have a small diameter and are thermally stable at high temperatures. The process is carried out by initially forming fibers from a preceramic polymeric precursor comprising methylpolydisilylazane resins. The fibers are then infusibilized to render them nonmelting followed by a pyrolysis step in which the fibers are heated to a temperature in excess of 1600°C. in a nonoxidizing atmosphere to form substantially polycrystalline silicon carbide fibers. The substantially polycrystalline silicon carbide fibers which are formed by the process of the present invention have at least 75% crystallinity and have a density of at least about 2.9 gm/cc. The polymeric precursor or the fibers contain, or have incorporated therein, at least about 0.2% by weight boron. This incorporation of boron may be accomplished either prior to or during formation of the fibers or during at least one of the infusibilizing or pyrolyzing steps of the process. |
| priorityDate | 1990-06-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 44.