Synthesis of tungsten sub-carbide W2C from graphite/tungsten powder mixtures by eruptive heating in a solar furnace

International Journal of Refractory Metals and Hard Materials

Volumn 25, Issue 4, 2007, Pages 351-357

  Almeida Costa Oliveira, Fernando ^a   Granier, Bernard ^b   Badie, Jean Marie ^b   Cruz Fernandes, Jorge ^c   Guerra Rosa, Luis ^c   Shohoji, Nobumitsu ^a  

^a INETI   (Portugal)

^b CNRS   (France)

^c INSTITUTO SUPERIOR TÉCNICO   (Portugal)

Author keywords

Nano meter scale WC whisker; Non stoichiometry; Solar furnace; Tungsten sub carbide W2C; Ultra fast heating; Vickers microhardness

Indexed keywords

ARGON; GRAPHITE; SOLAR HEATING; SOLAR RADIATION; STOICHIOMETRY; SYNTHESIS (CHEMICAL);

ERUPTIVE HEATING; MOLE RATIOS; SOLAR FURNACES; ULTRA FAST HEATING;

TUNGSTEN CARBIDE;

EID: 34247166101     PISSN: 02634368     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.ijrmhm.2006.10.002     Document Type: Article

References (14)

1. 2C formed from tungsten/carbon powder mixture during eruptive heating in a solar furnace. Int J Refractory Met Hard Mater 25 (2007) 101-106
2. Martínez D, Rodríguez J, Guerra Rosa L, Cruz Fernandes J, Shohoji N. Influence of gas environment on synthesis of silicon carbide and some carbides and carbonitrides of d-group transition metals through reaction between metal powders and amorphous carbon powders in a solar furnace at P.S.A. (Plataforma Solar de Almería). J de Phys IV (Symp Ser) 1999; 9 (Proceedings 3); 405-10.
3. Shohoji N., Guerra Rosa L., Cruz Fernandes J., Martínez D., and Rodríguez J. Catalytic acceleration of graphitisation of amorphous carbon during synthesis of tungsten carbide from tungsten and excess amorphous carbon in a solar furnace. Mater Chem Phys 58 (1999) 172-176
4. Shohoji N., Amaral P.M., Cruz Fernandes J., Guerra Rosa L., Martínez D., and Rodríguez J. Catalytic graphitisation of amorphous carbon during solar carbide synthesis of VIa-group metals (Cr, Mo and W). Mater Trans, JIM (Jpn Inst Met) 41 (2000) 246-249
5. Rodríguez J., Martínez D., Guerra Rosa L., Cruz Fernandes J., Amaral P.M., and Shohoji N. Photochemical effects in carbide synthesis of d-group transition metals (Ti, Zr, V; Nb, Ta; Cr, Mo, W) in a solar furnace at PSA (Plataforma Solar de Almería). J Solar Energy Eng (Trans ASME (Amer Soc Mech Eng)) 123 (2001) 109-116
6. Storms E.K. The refractory carbides (1967), Academic Press, New York
7. Cruz Fernandes J, Almeida Costa Oliveira F, Granier B, Badie JM, Guerra Rosa L, Shohoji N. Kinetic aspects of reaction between tantalum and carbon material (active carbon or graphite) under solar radiation heating. Solar Energy 2007;81, in press.
8. 1-x phase at a temperature lower than 1660 °C by a solar radiation heating under presence of excess free carbon. Int J Refractory Met Hard Mater 2007;25, in press.
9. Amaral P.M., Cruz Fernandes J., Guerra Rosa L., Martínez D., Rodríguez J., and Shohoji N. Carbide formation of Va-group metals (V, Nb and Ta) in a solar furnace. Int J Refractory Met Hard Mater 18 (2000) 47-53
10. Hara A., and Miyake M. Studies on the formation process of tungsten carbide powder from tungsten powder. Nippon Kinzoku Gakkai-shi (J Jpn Inst Met) 33 (1969) 1323-1328
11. x (x = 0.50, 0.625, 0.75, 0.85, 0.90 and 1.0) by X-ray diffraction, density and Vickers microhardness. Mater Chem Phys 77 (2002) 711-718
12. 2 radical. Chem Phys Lett 358 (2002) 199-206
13. Köster U, Hillenbrand HG. Mechanical properties of amorphous alloys. In: Proc Conf on Metallic Glasses: Science and Technology, Budapest, 1980, vol. I, pp. 71-83.
14. Hugosson H.W., and Engqvist H. The connection between the electronic structure and the properties of binderless tungsten carbides. Int J Refractory Met Hard Mater 21 (2003) 55-61