Pulsed current activated synthesis and consolidation of nanostructured Ti-TiC composite and its mechanical properties
- Pulsed current activated synthesis and consolidation of nanostructured Ti-TiC composite and its mechanical properties
- 홍경태; 윤진국; 김동기; 박나라; 김병수; 손인진
- Synthesis; Composite materials; Nanomaterials; Mechanical properties; Sintering
- Issue Date
- Journal of nanoscience and nanotechnology
- VOL 16, NO 2-1901
- Ti and CNT powders were milled by high energy ball milling. The milled powders were then simultaneously synthesized and consolidated using pulsed current activated sintering (PCAS) within one minute under the applied pressure of 80 MPa. The advantage of this process is not only rapid densification to near theoretical density but also to prevent grain growth in nano -structured materials The milling did not induce any reaction between the constituent powders. Meanwhile, PCAS of the Ti-CNT mixture produced a Ti-TiC composite according to the reaction (Ti+0.06CNT s 0.94Ti + 0.06TiC, Ti + 0.12CNT -> 0,88Ti + 0,12TiC). Highly dense nanocrystalline Ti-TiC composites with a relative density of up to 99.5% were obtained within one minute. The hardness and fracture toughness of the dense Ti-6mole% TiC and Ti-12 mole% TiC produced by PCAS were also investigated.
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