Kannan, R and Rangaraj, L (2019) Properties of C f /SiC-ZrB 2 -Ta x C y composite produced by reactive hot pressing and polymer impregnation pyrolysis (RHP/PIP). Journal of the European Ceramic Society, 39 (7). pp. 2257-2265. ISSN 09552219
Full text not available from this repository.Abstract
C f /SiC-ZrB 2 -Ta x C y composite was synthesized by reactive hot pressing (RHP) of C f cloth, polycarbosilane (PCS), ZrB 2 , and Ta powders at 4 MPa and 1200 °C. PIP cycle influenced sintering process by increasing density of the composite from 2.34 to 2.82 g/cc. Residual carbon produced during the PIP cycles at 1200 °C was utilized to yield Ta x C y by the addition of Ta. SEM images illustrate that by increasing the number of PIP cycles, SiC derived from the PCS cover the C f fibre, micropores, and cracks. PIP cycles and Ta x C y phase improved flexural strength of the composite from 20 to 114 MPa. Mass and linear ablation resistance studies at 1600–2000 °C exhibited that oxide formation at the outer surface caused a barrier; further, no oxidation underneath the composite was observed. SEM images display that at 2000 °C, SiO 2 and Ta x O y were molten and sealed the pores. Hence, ablation resistance was enhanced by blocking the penetration in high-temperature flame.
| Item Type: | Article |
|---|---|
| Subjects: | CHEMISTRY AND MATERIALS > Chemistry and Materials (General) CHEMISTRY AND MATERIALS > Metals and Metallic Materials |
| Depositing User: | Mrs SK Pratibha |
| Date Deposited: | 30 Mar 2021 09:07 |
| Last Modified: | 30 Mar 2021 09:07 |
| URI: | http://nal-ir.nal.res.in/id/eprint/13386 |
Actions (login required)
 |
View Item |
