TY - JOUR
T1 - Transient liquid phase bonding assisted spark plasma sintering of La-Fe-Si magnetocaloric bulk materials
AU - Zhong, Xichun
AU - Wu, Yucai
AU - Li, Yuanxin
AU - Huang, Xuan
AU - Liu, Cuilan
AU - Huang, Jiaohong
AU - Liu, Zhongwu
AU - Jiao, Dongling
AU - Qiu, Wanqi
AU - Zhong, Minglong
AU - Zhong, Zhenchen
AU - Ramanujan, R. V.
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/11/25
Y1 - 2023/11/25
N2 - The poor mechanical properties of La-Fe-Si based alloys restrict the potential of these magnetocaloric materials. Hence, a novel transient liquid phase bonding (TLPB) processing technique was deployed during spark plasma sintering (SPS) of La-Fe-Si based bulk materials. A series of binder-free LaFe11.8Si1.2 bulk materials were prepared by SPS and hot-pressing sintering (HPS). Transient melting, which occurred during SPS, accelerated the decomposition of the 1:13 phase, resulting in low porosity and high strength. Compared to HPS samples, SPS samples have significantly larger maximum compressive strength (σbc)max of ∼637.9 MPa at a strain of 4.7%, good thermal conductivity of ∼7.6 W·m−1·K−1 at 300 K, and a large (−ΔSM)max value of ∼11.7 J·kg−1·K−1 at TC= 193 K under a magnetic field change of 0 − 5 T. Thus, binder-free La-Fe-Si based bulk magnetocaloric materials with an excellent property set have been successfully prepared by TLPB assisted SPS technology.
AB - The poor mechanical properties of La-Fe-Si based alloys restrict the potential of these magnetocaloric materials. Hence, a novel transient liquid phase bonding (TLPB) processing technique was deployed during spark plasma sintering (SPS) of La-Fe-Si based bulk materials. A series of binder-free LaFe11.8Si1.2 bulk materials were prepared by SPS and hot-pressing sintering (HPS). Transient melting, which occurred during SPS, accelerated the decomposition of the 1:13 phase, resulting in low porosity and high strength. Compared to HPS samples, SPS samples have significantly larger maximum compressive strength (σbc)max of ∼637.9 MPa at a strain of 4.7%, good thermal conductivity of ∼7.6 W·m−1·K−1 at 300 K, and a large (−ΔSM)max value of ∼11.7 J·kg−1·K−1 at TC= 193 K under a magnetic field change of 0 − 5 T. Thus, binder-free La-Fe-Si based bulk magnetocaloric materials with an excellent property set have been successfully prepared by TLPB assisted SPS technology.
KW - A. Magnetic materials
KW - B. Magnetic properties
KW - B. Mechanical properties
UR - http://www.scopus.com/inward/record.url?scp=85165606154&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85165606154&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2023.171419
DO - 10.1016/j.jallcom.2023.171419
M3 - Article
AN - SCOPUS:85165606154
SN - 0925-8388
VL - 965
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
M1 - 171419
ER -