Research output: Contribution to journal › Article › peer-review
Elimination of oxide films during Spark Plasma Sintering of metallic powders : A case study using partially oxidized nickel. / Dudina, Dina V.; Bokhonov, Boris B.
In: Advanced Powder Technology, Vol. 28, No. 2, 01.02.2017, p. 641-647.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Elimination of oxide films during Spark Plasma Sintering of metallic powders
T2 - A case study using partially oxidized nickel
AU - Dudina, Dina V.
AU - Bokhonov, Boris B.
PY - 2017/2/1
Y1 - 2017/2/1
N2 - We present a case study addressing the issue of surface cleaning of the particles of metallic powders from oxide films during Spark Plasma Sintering (SPS). Based on the results obtained using an intentionally oxidized powder of carbonyl nickel (O/Ni(at.) = 0.2), we show that when the powder is heated in the SPS chamber but is not in direct contact with graphite foil commonly used in the SPS practice, the reduction of the oxide is limited to the surface layers of the powder bed. Comparative sintering experiments with graphite and copper foils indicate that a direct contact with a source of carbon is critical for the elimination of the oxide from the sintered compact. Compacts/regions of the compacts, in which nickel oxide NiO was reduced, showed more pronounced inter-particle necking than the regions maintaining the initial oxide concentration.
AB - We present a case study addressing the issue of surface cleaning of the particles of metallic powders from oxide films during Spark Plasma Sintering (SPS). Based on the results obtained using an intentionally oxidized powder of carbonyl nickel (O/Ni(at.) = 0.2), we show that when the powder is heated in the SPS chamber but is not in direct contact with graphite foil commonly used in the SPS practice, the reduction of the oxide is limited to the surface layers of the powder bed. Comparative sintering experiments with graphite and copper foils indicate that a direct contact with a source of carbon is critical for the elimination of the oxide from the sintered compact. Compacts/regions of the compacts, in which nickel oxide NiO was reduced, showed more pronounced inter-particle necking than the regions maintaining the initial oxide concentration.
KW - Carbon
KW - Nickel oxide
KW - Reduction
KW - Sintering
KW - CU
KW - CARBON
KW - SPS
KW - MECHANICAL-PROPERTIES
KW - MICROSTRUCTURE
KW - CERAMICS
UR - http://www.scopus.com/inward/record.url?scp=85010807518&partnerID=8YFLogxK
U2 - 10.1016/j.apt.2016.12.001
DO - 10.1016/j.apt.2016.12.001
M3 - Article
AN - SCOPUS:85010807518
VL - 28
SP - 641
EP - 647
JO - Advanced Powder Technology
JF - Advanced Powder Technology
SN - 0921-8831
IS - 2
ER -
ID: 10313687