Scully, Scott, Murphy & Presser
Irregular shape change of tungsten/matrix interface in tungsten based heavy alloys
 A method for producing an irregular tungsten/matrix interface in tungsten based heavy alloy is disclosed. The method involves a cyclic heat treatment and resintering at above liquidus temperature for tungsten heavy alloys consisting of 80 to 98 weight % tungsten and remainder of matrix phase. The sintered specimens are cyclically heat treated at above 1000.degree. C. and resintered at liquidus temperature of the matrix phase for one minute to 4 hours at a constant temperature. 
Agency for Defense Development
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inventional inventional additional inventional inventional
Joon Woong Moon Hee Woon Hyung Heung Sub Eun Pyo Seong
Noh Hong Baek Song Kim Lee