期刊
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
卷 40A, 期 10, 页码 2401-2409出版社
SPRINGER
DOI: 10.1007/s11661-009-9934-x
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资金
- Army Research Office [46828-MS-ISP]
- NASA [NCC-1-02038]
- Texas Center for Superconductivity, University of Houston
We present a method for spark plasma sintering (SPS) with reduced thermal and electrical losses compared to all-graphite SPS. Relative to the all-graphite configuration, the present design significantly reduces both the required power input and total current for the same synthesis temperature (e.g., 7.5 vs 0.6 kW and 1530 vs 350 A at 900 C-o). These reductions allow for significantly smaller power source and process chamber, drastic reduction in energy consumption, easier thermal management, and enhanced synthesis/homogenization by eliminating die leakage currents, allowing for maximization of current density and its intrinsic effect on homogenization by diffusion. A finite element (FE) model solution for temperature and current distributions, as well as thermal losses for both the present and the all-graphite SPS setups, is presented and compared to experimental results.
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