In this study, a core–shell composite powder with Mo as the shell material and β-SiC as the core material was produced via chemical vapour transport caused by the hydrogen reduction of Mo oxide. Using this core–shell composite powder, a Mo silicide composite with uniformly dispersed β-SiC was fabricated by pressureless sintering at 1400°C. The relative density of specimens sintered for 10 hours was 96.1% and the electrical resistivity was 4.68 × 10−5 Ω m. It was concluded that a β-SiC dispersed molybdenum silicide composite with enhanced electrical resistivity was successfully fabricated at a relatively low sintering temperature using the core–shell composite powder.
TuominenS. M. and DahlJ. M.: ‘Cyclic oxidation testing of molybdenum protected by silicide coatings’, J. Less-Common Met., 1981, 81, 249–260. doi: 10.1016/0022-5088(81)90031-X
2.
SekidoN., SakidjaR. and PerepezkoJ. H.: ‘Annealing response of point defects in off-stoichiometric Mo5SiB2 phase’, Intermetallics, 2007, 15, 1268–1276. doi: 10.1016/j.intermet.2007.03.009
3.
AbbasiA. R. and ShamanianM.: ‘Synthesis of Mo–Mo5SiB2–Mo3Si nanocomposite powders by two-step mechanical alloying and subsequent heat treatment’, J. Alloys Compd., 2011, 509, 8097–8104. doi: 10.1016/j.jallcom.2011.05.066
4.
LiuY. Q., ShaoG. and TsakiropoulosP.: ‘On the oxidation behavior of MoSi2’, Intermetallics, 2001, 9, 125–136. doi: 10.1016/S0966-9795(00)00114-X
5.
LiuY., ShaoG. and TsakiropoulosP.: ‘Thermodynamic reassessment of the Mo–Si and Al–Mo–Si systems’, Intermetallics, 2000, 8, 953–962. doi: 10.1016/S0966-9795(00)00068-6
6.
LimC. B., YanoT. and IsekiT.: ‘Microstructure and mechanical properties of RB-SiC/MoSi2 composite’, J. Mater. Sci., 1989, 24, 4144–4151. doi: 10.1007/BF01168987
7.
VasudévanA. K. and PetrovicJ. J.: ‘A comparative overview of molybdenum disilicide composites’, Mater. Sci. Eng. A, 1992, 155, 1–17. doi: 10.1016/0921-5093(92)90308-N
8.
PanJ., SurappaM. K., SaravananR. A., LiuB. W. and YangD. M.: ‘Fabrication and characterization of SiC/MoSi2 composites’, Mater. Sci. Eng. A., 1998, 244, 191–198. doi: 10.1016/S0921-5093(97)00553-4
9.
ByunJ. M., HwangS. H., LeeS., SukM. J., OhS. T. and KimY. D.: ‘Microstructure control of Mo–Si–B alloy for formation of continuous Mo phase’, Int. J. Refract. Met. Hard Mater., 2015, 53, 61–65. doi: 10.1016/j.ijrmhm.2015.03.006
10.
Khorsand ZakA., MajidW. H. Abd., AbrishamiM. E. and YousefiR.: ‘X-ray analysis of ZnO nanoparticles by Williamson-Hall and size-strain ploy methods’, Solid State Sci., 2011, 13, 251–256. doi: 10.1016/j.solidstatesciences.2010.11.024
11.
LeeY. J., SeoY. I., KimS. H., KimD.-G., KimY. D.: ‘Optical properties of molybdenum oxide thin films deposited by chemical vapor transport of MoO3(OH)2’, J. Alloys Compd., 2014, 585, 418–422. doi: 10.1016/j.jallcom.2014.01.097
12.
LeeY. J., ParkC. W., KimD.-G., NicholsW. T., OhS. T. and KimY. D.: ‘MoO3 thin film synthesis by chemical vapor transport of volatile MoO3(OH)2’, J. Ceram. Process. Res., 2010, 11, 52–55.
13.
LooV., FransJ. J., SmetF. M., RieckG. D. and VerspuiG.: ‘Phase relations and diffusion paths in the Mo–Si–C system at 1200°C’, High Temp.-High Press., 1982, 14, 25–31.
14.
SturgesW. T. and HarrisonR. M.: ‘Semi-quantitative x-ray diffraction analysis of size fractionated atmospheric particles’, Atmos. Environ., 1989, 23, 1083–1098. doi: 10.1016/0004-6981(89)90309-0
15.
ZhouW., TangY., SongR., JiangL., HuiK. S. and HuiK. N.: ‘Characterization of electrical conductivity of porous metal fiber sintered sheet using four-point probe method’, Mater. Des., 2012, 37, 161–165. doi: 10.1016/j.matdes.2011.12.046
16.
HakamadaM., KuromuraT., ChenY., KusudaH. and MabuchM.: ‘Influence of porosity and pore size on electrical resistivity of porous aluminum produced by spacer method’, Mater. Trans., 2007, 48, 32–36. doi: 10.2320/matertrans.48.32
17.
LiuP. S., LiT. F. and FuC.: ‘Relationship between electrical resistivity and porosity for porous metals’, Mater. Sci. Eng. A, 1999, 268, 208–215. doi: 10.1016/S0921-5093(99)00073-8
