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    Monolithic Ceramic End Mill
    1.
    发明申请
    Monolithic Ceramic End Mill 有权
    单片陶瓷端铣刀

    公开(公告)号：US20120183363A1

    公开(公告)日：2012-07-19

    申请号：US13007840

    申请日：2011-01-17

    申请人： Danny R. Davis ,  Sean E. Landwehr ,  Russell L. Yeckley

    发明人： Danny R. Davis ,  Sean E. Landwehr ,  Russell L. Yeckley

    IPC分类号： B23C5/10

    CPC分类号： B23C5/10 ,  B23C2210/0421 ,  B23C2210/0428 ,  B23C2210/0435 ,  B23C2210/203 ,  B23C2210/205 ,  B23C2210/24 ,  B23C2210/28 ,  B23C2226/18 ,  Y10T407/1946 ,  Y10T407/1948 ,  Y10T407/1962 ,  Y10T407/27 ,  Y10T409/303752

    摘要： End mills are disclosed which may be made monolithically of ceramic or other materials. The cutting portions of the end mills have lengths of cut that are no more than twice their cutting diameters and cores which are at least 0.7 times their cutting diameters. Their axial blades have cutting edges with negative radial rake and are separated by helical flutes. Their cutting ends have negative axial rake and are gashed ahead of center and have radial cutting edges with negative rake. Such end mills also have radiused corners and gashes transitioning from radial to axial at a flute. Methods of milling materials using such ceramic end mills are also disclosed.

    摘要翻译： 公开了可以由陶瓷或其它材料制成的立铣刀。 端铣刀的切割部分的切割长度不得超过其切割直径的两倍，并且其切割直径的至少为其0.7倍。 它们的轴向叶片具有带负向径向耙的切削刃，并且被螺旋形槽纹分开。 它们的切割端具有负轴向前倾，并且在中心之前被填充，并具有具有负耙的径向切割边缘。 这种立铣刀还具有圆角和凹陷，其在笛纹从径向向轴向转变。 还公开了使用这种陶瓷端铣刀研磨材料的方法。

    Monolithic ceramic end mill
    2.
    发明授权
    Monolithic ceramic end mill 有权
    整体陶瓷端铣刀

    公开(公告)号：US08647025B2

    公开(公告)日：2014-02-11

    申请号：US13007840

    申请日：2011-01-17

    申请人： Danny R. Davis ,  Sean E. Landwehr ,  Russell L. Yeckley

    发明人： Danny R. Davis ,  Sean E. Landwehr ,  Russell L. Yeckley

    IPC分类号： B23C5/10

    CPC分类号： B23C5/10 ,  B23C2210/0421 ,  B23C2210/0428 ,  B23C2210/0435 ,  B23C2210/203 ,  B23C2210/205 ,  B23C2210/24 ,  B23C2210/28 ,  B23C2226/18 ,  Y10T407/1946 ,  Y10T407/1948 ,  Y10T407/1962 ,  Y10T407/27 ,  Y10T409/303752

    摘要： End mills are disclosed which may be made monolithically of ceramic or other materials. The cutting portions of the end mills have lengths of cut that are no more than twice their cutting diameters and cores which are at least 0.7 times their cutting diameters. Their axial blades have cutting edges with negative radial rake and are separated by helical flutes. Their cutting ends have negative axial rake and are gashed ahead of center and have radial cutting edges with negative rake. Such end mills also have radiused corners and gashes transitioning from radial to axial at a flute. Methods of milling materials using such ceramic end mills are also disclosed.

    摘要翻译： 公开了可以由陶瓷或其它材料制成的立铣刀。 端铣刀的切割部分的切割长度不得超过其切割直径的两倍，并且其切割直径至少为其0.7倍。 它们的轴向叶片具有带负向径向耙的切削刃，并且被螺旋形槽纹分开。 它们的切割端具有负轴向前倾，并且在中心之前被填充，并具有具有负耙的径向切割边缘。 这种立铣刀还具有圆角和凹陷，其在笛纹从径向向轴向转变。 还公开了使用这种陶瓷端铣刀研磨材料的方法。

    Silicon nitride with improved high temperature strength
    8.
    发明授权
    Silicon nitride with improved high temperature strength 失效
    具有改善的高温强度的氮化硅

    公开(公告)号：US4904624A

    公开(公告)日：1990-02-27

    申请号：US144458

    申请日：1988-01-15

    申请人： Russell L. Yeckley

    发明人： Russell L. Yeckley

    IPC分类号： C04B35/593

    CPC分类号： C04B35/593

    摘要： The flexural strength and stress rupture life of isostatically hot pressed silicon nitride containing between 1 and 12 weight percent of rare earth oxide and not more than 0.5 weight percent alumina is substantially increased by treating green bodies in flowing nitrogen at a temperature between 1000.degree. and 1500.degree. C. before degassing for the isostatic hot pressing. The iron content of the bodies is also reduced by this heat treatment, and this is believed to eliminate sources of fracture failure. Silicon nitride bodies with a flexural strength in excess of 525 MPa at 1370.degree. C. and with stress rupture lives reliably in excess of 200 hours at 300 MPa stress at 1370.degree. C. can be prepared in this way. The strain rates of silicon nitride under high temperature stress can also be reduced.

    摘要翻译： 含有1〜12重量％稀土氧化物和不超过0.5重量％氧化铝的等静压热压氮化硅的弯曲强度和应力断裂寿命通过在1000〜1500℃的温度下处理生态体 在等离子体热压脱气前。 通过这种热处理也减少了这些物体的铁含量，这被认为是消除了断裂破坏的原因。 在1370℃下，弯曲强度超过525MPa，在1370℃下的应力断裂的应力断裂的可靠性超过200小时的氮化硅体可以以这种方式制备。 氮化硅在高温应力下的应变速率也可以降低。

    SiAlON containing ytterbium and method of making
    10.
    发明授权
    SiAlON containing ytterbium and method of making 有权
    含有镱的SiAlON及其制备方法

    公开(公告)号：US06964933B2

    公开(公告)日：2005-11-15

    申请号：US10679924

    申请日：2003-10-06

    申请人： Russell L. Yeckley

    发明人： Russell L. Yeckley

    IPC分类号： B23B27/14 ,  C04B35/597 ,  C04B35/599

    CPC分类号： C04B35/597

    摘要： A SiAlON material that includes a two phase composite of an alpha prime SiAlON phase and a beta prime SiAlON phase. The alpha prime phase contains ytterbium. The alpha prime SiAlON phase being present in an amount between about 25 weight percent and about 85 weight percent of the two phase composite. The SiAlON material further includes an intergranular phase.

    摘要翻译： 一种SiAlON材料，其包括α相SiAlON相和β原子SiAlON相的两相复合材料。 α原相含有镱。 α原子SiAlON相以两相复合材料的约25重量％至约85重量％的量存在。 SiAlON材料还包括晶间相。