发明名称 |
Method of forming tungsten carbide particles |
摘要 |
<p>Nanograined tungsten carbide particles are formed by a controlled, simultaneous reduction carburization reaction wherein the kinetics of the carburization and reduction reactions are controlled to permit simultaneous reduction and carburization. The kinetics are controlled by reacting a reduction carburization gas mixture, preferably hydrogen and carbon monoxide by slowly increasing the reaction temperature by controlling the rate of temperature increase. Preferably, the reaction temperature will be increased less than 25 DEG C per minute, preferably about 1-2 degrees per minute, which prevents the formation of stable, undesirable species such as W2C, which in tum interferes with the reaction efficiency.</p> |
申请公布号 |
EP0846659(A1) |
申请公布日期 |
1998.06.10 |
申请号 |
EP19970309635 |
申请日期 |
1997.11.28 |
申请人 |
NANODYNE INCORPORATED;RUTGERS UNIVERSITY |
发明人 |
SEEGOPAUL, PURNESH;GAO, LIN;KEAR, BERNARD |
分类号 |
B23B27/14;C01B31/34;(IPC1-7):C01B31/34 |
主分类号 |
B23B27/14 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|