| Penulis/Author |
Dr. Ir. Subarmono, MT. (1); Prof. Ir. Jamasri, Ph.D., IPU., ASEAN Eng. (2); Ir. M. Waziz Wildan, M.Sc., Ph.D., IPU (3); Dr.Ing. Ir. Kusnanto (4) |
| Abstrak/Abstract |
Aluminum matrix composite (AMC) were prepared from aluminum fine powder as a matrix and fly ash as reinforcement. The amount of fly ash of 2,5%, 5%, 7,5% and 10 wt% was added to the aluminum fine powder. Each composition was mixed using rotary mixer for 3 hr. The mixture was compacted using uniaxial compaction with a pressure of 100 MPa to produce green body and several of it was isostatic compacted with a pressure 100 MPa. Several of each green body were followed pressureless sintering at various temperature
of 500°, 525°, 550°,575° and 600ºC for 3 hr, and the other of uniaxial compacted green body were hot pressed sintering (HP) at pressure of 100 MPa and various temperature of 525°, 550° and 575°C. Bending strength, Vickers hardness, wear resistance, porosity of the AMC were tested, and the micro structure observed using SEM. The results show that the bending strength, Vickers hardness and wear resistance of AMC increase with decreasing of porosity. The bending strength, Vickers hardness and wear resistance of 6.3% porosity of hot pressed AMC are 65 MPa, 55 VHN and 0.15 mg/(MPa.m), respectively. The bending strength, Vickers hardness and wear resistance of 3 % porosity of hot pressed AMC are 79 MPa, 75 VHN and 0.02 mg/(MPa.m), respectively.
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