AbstractTiC/TiB2 ceramic–matrix com

Abstract
TiC/TiB2 ceramic–matrix composites were produced by self-propagating high temperature combustion syntheses combined with
pseudo hot isostatic pressing using Ti, B4C and carbon powder. The results of XRD and SEM analysis showed that the final product
was pure and no unreacted B4C, Ti or carbon appeared. The microstructure of synthesized products consisted of the clubbed
TiB2 grains and equiaxed or irregular TiC grains. The optimal ratio with Ti:B4C=3:1 of the reactant powder was determined by
experiments. The maximum relative density, hardness value, compression strength and bending strength was attained for TiC–
2TiB2 ceramic when the delay time is 5 s, keeping pressure time is 5 s and the pressure is 160 MPa, which is higher than TiC–TiB2
and 2TiC–TiB2 ceramics. The introduction of more clubbed TiB2 grains into TiC/TiB2 ceramics resulted in a drastic increase in the
fracture toughness for TiC–2TiB2 synthesized compacts.

ผลลัพธ์ (แอฟริกา) 1:

Abstract
TiC / TiB2 Keramiek-Matrix Composites is vervaardig deur Self-voortplantingsmateriaal hoë temperatuur verbranding sinteses Saam met
Pseudo met behulp van warm isostatisch druk Ti, B4C en koolstof poeier. Die resultate van XRD en SEM analise het getoon dat die finale produk
was suiwer en geen ongereageerde B4C, Ti of koolstof verskyn. Die mikrostruktuur van gesintetiseerde produkte Die clubbed uit
equiaxed of onreëlmatige TiC en TiB2 Graan Graan. Die optimale verhouding met Ti: B4C = 3: 1 van die poeier reaktant is bepaal deur
eksperimente. Die maksimum relatiewe digtheid, hardheid waarde, kompressie krag en buig sterkte was wat behaal is vir tiek
2TiB2 Keramiek Wanneer die vertraging is 5 S, Hou druk is 5 S en die druk is 160 MPa, wat hoër is as TiC-TiB2
en 2TiC. -TiB2 keramiek. Die bekendstelling van meer clubbed TiB2 korreltjies in TiC / TiB2 Keramiek gelei tot 'n drastiese toename in die
verbreking taaiheid vir 2TiB2 gesintetiseer TiC-kompakte.