TY - JOUR
T1 - Estudio de la descomposición de fases durante el sinterizado por plasma de compósitos Al-5%Ni3Al
AU - De León-Murguía, Norma V.
AU - López-Hirata, Víctor M.
AU - Ferreira-Palma, Carlos
AU - Rivas-López, Diego I.
AU - Hernández-Santiago, Felipe
AU - Dorantes-Rosales, Héctor J.
N1 - Publisher Copyright:
© 2019 CSIC.
PY - 2019
Y1 - 2019
N2 - The synthesis of Al-matrix composites reinforced with nanocrystalline intermetallic particles of Ni3Al was carried out with the Spark Plasma Sintering (SPS) technique. The Al-5%Ni3Al powder mixture was sintered by SPS at two different conditions: (i) 450 °C, 47 MPa and 180 s (4M47) and (ii) 520 °C, 16 MPa and 600 s (5M16). The Ni3Al particles were obtained by mechanical alloying after a milling time of 1260 ks. The composites show partial decomposition on the Ni3Al-Al interface, with the formation of the Al3Ni and Ni2Al3 phases. The analysis by TEM confirms the nanometric characteristics of the Ni3Al particles in the composites. The sintered composites 4M47 and 5M16 presented 95% and 87% of the theoretical density and Vickers microhardness values of 62.3±7 and 55.3±5 HV respectively. Nanoindentation tests show that the mechanical properties of the Al3Ni, Al3Ni2 and Ni3Al intermetallics are higher in high-pressure sintering conditions.
AB - The synthesis of Al-matrix composites reinforced with nanocrystalline intermetallic particles of Ni3Al was carried out with the Spark Plasma Sintering (SPS) technique. The Al-5%Ni3Al powder mixture was sintered by SPS at two different conditions: (i) 450 °C, 47 MPa and 180 s (4M47) and (ii) 520 °C, 16 MPa and 600 s (5M16). The Ni3Al particles were obtained by mechanical alloying after a milling time of 1260 ks. The composites show partial decomposition on the Ni3Al-Al interface, with the formation of the Al3Ni and Ni2Al3 phases. The analysis by TEM confirms the nanometric characteristics of the Ni3Al particles in the composites. The sintered composites 4M47 and 5M16 presented 95% and 87% of the theoretical density and Vickers microhardness values of 62.3±7 and 55.3±5 HV respectively. Nanoindentation tests show that the mechanical properties of the Al3Ni, Al3Ni2 and Ni3Al intermetallics are higher in high-pressure sintering conditions.
KW - Composites
KW - Diffusion
KW - Interface
KW - Mechanical alloying
KW - Nanoindentation
KW - Spark Plasma Sintering
UR - http://www.scopus.com/inward/record.url?scp=85073649667&partnerID=8YFLogxK
U2 - 10.3989/revmetalm.145
DO - 10.3989/revmetalm.145
M3 - Artículo
SN - 0034-8570
VL - 55
JO - Revista de Metalurgia (Madrid)
JF - Revista de Metalurgia (Madrid)
IS - 2
M1 - e145
ER -