Thermal cycling test of TiC-graphite
1984; Elsevier BV; Volume: 123; Issue: 1-3 Linguagem: Inglês
10.1016/0022-3115(84)90259-9
ISSN1873-4820
AutoresShinşuke Yamanaka, Hisanori Ohara, Pongun Son, Masanobu Miyake,
Tópico(s)Advanced ceramic materials synthesis
ResumoThermal cycling tests were performed on the TiC-Poco graphite prepared by diffusion annealing. The TiC coating survived quite well after 1000 thermal cycles between 500 and 1100°C. However, at the maximum temperature of 1200°C, the development of grain boundary steps and the localized microcracking were found to occur after 1000 cycles. The surface damage and erosion due to blistering and exfoliation could be observed on the polished TiC coating irradiated with 40 keV He+ to a dose of 1.8 × 1017 ions/cm2 whereas the surface of the as-prepared coating showed no damage up to a dose of 1.4 × 1018 ions/cm2. The results for thermal cycling tests of the post-irradiated TiC coating indicated that in the case of the coating irradiated below the critical dose for blister formation the gaseous release of the implanted atoms caused the serious surface damage.
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