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펄스전류 활성 소결에 의한 나노구조 Al2TiO5 화합물 제조 및 기계적 특성
강현수 ( Hyun Su Kang ),박현국 ( Hyun Kuk Park ),도정만 ( Jung Mann Doh ),윤진국 ( Jin Kook Yoon ),박방주 ( Bang Ju Park ),손인진 ( In Jin Shon ) 대한금속재료학회(구 대한금속학회) 2012 대한금속·재료학회지 Vol.50 No.11
Nano powders of Al2O3 and TiO2 compounds made by high energy ball milling were pulsed current activated sintered for studying their sintering behaviors and mechanical properties. The advantage of this process is that it allows very quick densification to near theoretical density and inhibition of grain growth. Nano-structured Al2TiO5 with small amount of Al2O3 and TiO2 was formed by sintering at 1300℃ for 5 minute, in which average grain size was about 96 nm. Hardness and fracture toughness of the nano-structured Al2TiO5 compound with a small amount of Al2O3 and TiO2 were 602 kg/mm2 and 2.6 MPa.m1/2, respectively.