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一种β-SiN定向有序排布氮化硅陶瓷整体立铣刀制备方法
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8Claims · 2 independent
§ Ⅰ
Dossier Overview
Inventor
汪振华; 王佳浩; 尹朝辉
IPC Classification
C04B 35/584 (2006.01)C04B 35/622 (2006.01)
本发明属于立铣刀制备领域,具体涉及一种β‑SiN定向有序排布氮化硅陶瓷整体立铣刀制备方法。将氮化硅基混合粉末装填在卧式烧结模具中、填充的粉末在烧结模具中呈长轴状,进行SPS烧结,烧结时烧结压力作用于粉末的长轴方向,使得烧结过程中β‑SiN晶粒沿长轴方向定向排布,形成微观结构有序的陶瓷基体;将陶瓷基体制备成立铣刀、且使晶粒高耐磨棱柱面平行于切削过程中的主切削力方向。本发明成功突破传统SPS制备整体立铣刀的尺寸限制,并显著提升氮化硅陶瓷刀具的抗崩刃性能和服役寿命。
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