1Introduction . Due to its high melting point (3410 °C), high density (19.3?g·cm ?3 ), high hardness, high wear and corrosion resistance, low vapor pressure, excellent high temperature strength and thermal conductivity, tungsten and tungsten alloys are widely used in machinery, electronics, chemical industry, aviation, aerospace and other fields [ 1 ]. Sintering is a process that consumes lots of energy and labor, and it is also a key process that affects the performance and serv...