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Ni 피복된 Al2O3 입자분산강화에 의한 Al 기 복합재료 제조
최진일,원창환,강복석,양태성,서영식 대한금속재료학회(대한금속학회) 1996 대한금속·재료학회지 Vol.34 No.5
The experimental results from the fabrication of AC4C/Ni-coated Al₂O₃ composites by oxide dispersion strengthening are summerized as follows; 1) Optimum condition obtained in Ni-Al₂O₃ composites powder preparation was molar ratio of NH₃/Ni^(++) 1.5 : 1, reduction temperature 130℃, stirring speed 600rpm, hydrogen partial pressure 350 psi and reduction time 60 mins. 2) Ni coating to Al₂O₃ surface improved wettability by decreasing surface tension of the matrix and particles. 3) The tensile strength, hardness and wear resistance increased with increasing the volume fraction and decreasing the particle size. In case of the tensile strength at 12vol.% was about 25% higher than that of matrix alloy(Al-2Cu-2Mg).