| 학회 | 한국재료학회 |
| 학술대회 | 2008년 봄 (05/22 ~ 05/23, 상록리조트) |
| 권호 | 14권 1호 |
| 발표분야 | 에너지환경/생체재료 |
| 제목 | High-temperature Air Oxidation of Quaternary Ti3Al0.5Si0.5C2 Nanolaminate Compounds |
| 초록 | The nanolayered, machinable quaternary compounds, Ti3Al0.5Si0.5C2, were synthesized by hot pressing the powders of TiC, Al, and Si. Fully dense, monolithic Ti3Al0.5Si0.5C2 compounds were prepared. The Ti3Al0.5Si0.5C2 compounds having lamellar grains were oxidized between 900 and 1200 oC in air. The oxidation of Ti3Al0.5Si0.5C2 produced rutile-TiO2, α-Al2O3, and amorphous SiO2, together with the evolution of CO or CO2 gases. The oxide scale consisted primarily of an outer TiO2-rich layer, an intermediate Al2O3 layer, and an inner TiO2-rich layer. Relatively thick scales formed because of the formation of the semi-protective TiO2 and the gaseous escape of carbon. During oxidation, Ti and Al diffused outward to form the outer (TiO2 Al2O3)-mixed oxide layer. Al also diffused outward to form the intermediate Al2O3 layer. Oxygen diffused inward to form the inner (TiO2 Al2O3 SiO2)-mixed oxide layer. Carbon escaped into the air. Ti3Al0.5Si0.5C2 oxidized slower than Ti, Fe and Co, but faster than Ni, Cr, Si and α-Al2O3-forming kinetics. |
| 저자 | Thuan Dinh Nguyen, 이동복 |
| 소속 | 성균관대 |
| 키워드 | Sintering; Nanocomposites; Corrosion; Carbides; Structural applications |
