TiC/TiB2 ceramic–matrix composites

TiC/TiB2 ceramic–matrix composites have more
superior properties comparing with monolithic TiB2
and TiC ceramic. They are attractive for application in
aircraft propulsion systems and space thermal protection
systems because of their high melting point, good thermal
shock resistance and excellent high-temperature stability.
They are also potential candidates for application in
cutting tools, die, machine tool insert, wear-resistant
parts and lighter armor materials for their high hardness,
elastic modulus and light weight. Moreover, they can be
used as cathodes for Hall-Heroult cell due to their good
electrical conductivity [1–3].
Consolidation of these materials into usable, dense
and high-strength is difficult because of the high degree
of covalent bonding and low self-diffusion coefficient of
the constituent elements. Dense TiC/TiB2 ceramics have
been fabricated by reactive hot pressing [4] and transient
plastic phase processing [5], but they are costly for the

ผลลัพธ์ (แอฟริกา) 1:

TiC / TiB2 Keramiek-Matrix Composites Het meer
beter Properties vergelyk met monolitiese TiB2
en TiC Keramiek. Hulle is aantreklik vir toepassing in
vliegtuigpropulsie Systems and Space hitte beskerming
Systems gevolg van hul hoë smeltpunt, goeie termiese
skok weerstand en 'n uitstekende hoë-temperatuur stabiliteit.
Hulle is ook potensiële kandidate vir toepassing in
sny gereedskap, sterf, masjien Tool insetsel, dra. bestand
Armor Onderdele en ligter materiaal vir hul hoë hardheid,
Elastiese modulus en ligte gewig. Verder, kan hulle
gebruik word as katodes vir Hall-Heroult Cell As gevolg van hul goeie
elektriese geleiding [1-3].
Konsolidasie van hierdie materiaal in bruikbare, digte
en hoë-sterkte is moeilik as gevolg van die groot mate
van kovalente binding en lae self. -diffusion koëffisiënt van
die elemente samestellende. Digte TiC / TiB2 Keramiek Het
vervaardigde deur reaktiewe warm druk [4] en verbygaande
fase Plastic verwerking [5], maar hulle is duur vir die.