| Yazarlar (3) |
Dr. Öğr. Üyesi Farzın ARIANPOUR
|
Farhad Golestanifard
|
|
Hamıd Reza Rezaie
|
| Özet |
| TaC and HfC are thought to have the highest melting point (~4000°C) among all refractory materials. The binary solid solution of TaC and HfC (Ta4HfC5) is also considered as the most refractory material with the melting point over 4000 °C and valuable physical and mechanical properties. The main goal of this work is to fabricate TaC/HfCbased composites which consolidated by means of spark plasma sintering (SPS) with addition of MoSi2 as sintering aid and carbon nanotubes (CNTs) as reinforcement at 2000 °C. The effects of additives were investigated in terms of densification, mechanical properties, phase and microstructural evolutions. It was demonstrated that the relative density could reach from 94 % TD (for binder less sample) to near 99 % for samples containing additives, respectively. The average Vickers hardness and fracture toughness values were in the range of 16-19 MPa and 2.9-5.3 MPa.m1/2. The samples containing CNTs showed improved fracture toughness and the survivability of CNTs, after spark plasma sintering, was proved by scanning electron microscopy of fractured surfaces in addition to the Raman spectroscopy analysis. |
| Anahtar Kelimeler |
| Makale Türü | Özgün Makale |
| Makale Alt Türü | Diğer hakemli uluslarası dergilerde yayınlanan tam makale |
| Dergi Adı | Advanced Ceramics Progress |
| Dergi Tarandığı Indeksler | ISC |
| Makale Dili | İngilizce |
| Basım Tarihi | 01-2016 |
