| 학회 | 한국재료학회 |
| 학술대회 | 2014년 가을 (11/27 ~ 11/28, 대전컨벤션센터) |
| 권호 | 20권 2호 |
| 발표분야 | B. 나노 재료(Nanomaterials) |
| 제목 | Mechanochemical Synthesis and Rapid Consolidation of Nanocrystalline 2Fe-Al2O3 and its Mechanical Properties |
| 초록 | The continuous increase in the performance requirement of materials for aerospace and automotive applications have lead to development of several structural composite materials. Among these, metal matrix composites refer to a kind of material in which rigid ceramic reinforcements are embedded in a ductile metal or alloy matrix. Metal matrix composites combine metallic properties (ductility and toughness) with ceramic characteristics (high strength and modulus), leading to greater strength in shear and compression and to higher service temperature capabilities. The attractive physical and mechanical properties that can be obtained with metal matrix composites, such as high specific modulus, strength-to weigh ratio, fatigue strengh, and temperature stability and wear resistance, have been documented extensively Nano-powders of Fe and Al2O3 were synthesized from Fe2O3 and 2Al powders by high energy ball milling. nanocrystalline Fe-Al2O3 composite was consolidated by rapid sintering method within 3 min from mechanically alloyed powders of Al2O3 and 2Fe. The average grain size and mechanical properties of the composite were investigated. The relative density of the composite was 96% for the applied pressure of 80 MPa and the induced current. The average grain sizes of Fe and Al2O3 prepared by HFIHS were about 290 nm and 85 nm, respectively. The average hardness and fracture toughness values obtained were 1200 kg/mm2 and 6 MPa•m1/2, respectively. |
| 저자 | 강보람, 손인진 |
| 소속 | 전북대 |
| 키워드 | Rapid sintering; Composite; Nanophase; Mechanical properties; Fe-Al2O3 |
