^pKey;
Laboratory;
of;
Powder;
Metallurgy,;
Central;
South;
University,;
Changsha;
410083,;
China;
^pKey;
Laboratory;
of;
Porous;
Metal;
Materials,;
Northwest;
Institute;
for;
Nonferrous;
Metal;
Research,;
Xi'an;
710016,;
China;
^pEngineering;
Research;
Center;
of;
Near-Net-Shape;
Forming;
for;
Metallic;
Materials,;
South;
China;
University;
of;
Technology,;
Guangzhou;
510641,;
China;