TY - JOUR
T1 - Homogeneous dispersion of boron nitride nanoplatelets in powder feedstocks for plasma spraying
AU - Lu, Xiaolong
AU - Zhang, Cheng
AU - Agarwal, Arvind
AU - Chen, Yao
N1 - Publisher Copyright:
© 2021 The Society of Powder Technology Japan
PY - 2021/11
Y1 - 2021/11
N2 - Hexagonal Boron nitride nanoplatelet (BNNP) with the combination of excellent mechanical properties, high-temperature thermal stability, and self-lubrication is a promising strengthening agent in plasma-sprayed composite coatings. However, it is a significant challenge to produce plasma sprayable feedstocks with homogeneously dispersed BNNPs owing to the intrinsic agglomeration of BNNPs. In this research, three powder preparation processes (electrostatic interaction, ball milling, and shear mixing) were employed to disperse BNNPs in Ni-Cr-Cr2O3 (NCCO) powders. The shear mixing process presents a competitive advantage in powder preparation, providing stable shear force and achieving exfoliated BNNPs homogeneous distribution in the composite powders. The spray drying technique was finally utilized to obtain spherical agglomerated BNNP-NCCO feedstocks with characteristics of relatively smooth surface and uniform size distribution. Hence, shear mixing and spray drying processes are expected to produce large-scale spherical composite powders with a homogeneous distribution of 2D layered nanomaterials for industrial application.
AB - Hexagonal Boron nitride nanoplatelet (BNNP) with the combination of excellent mechanical properties, high-temperature thermal stability, and self-lubrication is a promising strengthening agent in plasma-sprayed composite coatings. However, it is a significant challenge to produce plasma sprayable feedstocks with homogeneously dispersed BNNPs owing to the intrinsic agglomeration of BNNPs. In this research, three powder preparation processes (electrostatic interaction, ball milling, and shear mixing) were employed to disperse BNNPs in Ni-Cr-Cr2O3 (NCCO) powders. The shear mixing process presents a competitive advantage in powder preparation, providing stable shear force and achieving exfoliated BNNPs homogeneous distribution in the composite powders. The spray drying technique was finally utilized to obtain spherical agglomerated BNNP-NCCO feedstocks with characteristics of relatively smooth surface and uniform size distribution. Hence, shear mixing and spray drying processes are expected to produce large-scale spherical composite powders with a homogeneous distribution of 2D layered nanomaterials for industrial application.
KW - Ball milling
KW - BN nanoplatelets
KW - Electrostatic interaction
KW - Shear mixing
KW - Spray drying
UR - http://www.scopus.com/inward/record.url?scp=85115077834&partnerID=8YFLogxK
U2 - 10.1016/j.apt.2021.09.017
DO - 10.1016/j.apt.2021.09.017
M3 - Article
AN - SCOPUS:85115077834
SN - 0921-8831
VL - 32
SP - 4167
EP - 4176
JO - Advanced Powder Technology
JF - Advanced Powder Technology
IS - 11
ER -