公开(公告)号：US5162147A

公开(公告)日：1992-11-10

申请号：US552223

申请日：1990-07-13

申请人： Sakari A. Ruppi

发明人： Sakari A. Ruppi

IPC分类号： B23B27/14 ,  B22F3/24 ,  C23C8/20 ,  C23C10/48 ,  C23C16/30 ,  C23C16/40 ,  C23C28/04 ,  C23C30/00

CPC分类号： C23C16/30 ,  C23C16/403 ,  C23C30/005 ,  Y10T407/27 ,  Y10T428/24942 ,  Y10T428/24975 ,  Y10T428/265 ,  Y10T428/30 ,  Y10T428/31678

摘要： Improved properties of aluminum oxide water layers on cemented carbides and related substrates can be obtained by having the outermost alumina layer in the form of kappa-Al.sub.2 O.sub.3 deposited on a kappa-modification layer.

摘要翻译： 通过使kappa-Al2O3形式的最外层氧化铝层沉积在kappa改性层上，可以获得在硬质合金和相关基底上氧化铝水层的改进性能。

公开(公告)号：US5137774A

公开(公告)日：1992-08-11

申请号：US552222

申请日：1990-07-13

申请人： Sakari A. Ruppi

发明人： Sakari A. Ruppi

IPC分类号： B23B27/14 ,  B22F3/24 ,  C23C8/20 ,  C23C10/48 ,  C23C16/30 ,  C23C16/40 ,  C23C28/04 ,  C23C30/00

CPC分类号： C23C16/30 ,  C23C16/403 ,  C23C30/005 ,  Y10T407/27 ,  Y10T428/24942 ,  Y10T428/24975 ,  Y10T428/265 ,  Y10T428/30 ,  Y10T428/31678

摘要： Improved properties of aluminum oxide wear layers on cemented carbides and related substrates can be obtained by combining the two alumina polymorphs (.alpha.-Al.sub.2 O.sub.3 and kappa-Al.sub.2 O.sub.3) as multilayers. The nucleation of .alpha.-Al.sub.2 O.sub.3 and particularly kappa-Al.sub.2 O.sub.3 can be controlled by means of modification layers. According to this invention, it is thus possible to CVD-deposit an oxide multicoating layer consisting of clearly specified layers of .alpha.-Al.sub.2 O.sub.3 and kappa-Al.sub.2 O.sub.3. Preferably, .alpha.-Al.sub.2 O.sub.3 is deposited first by CVD on a TiC coated cemented carbide substrate followed by the said coating layer of kappa-Al.sub.2 O.sub.3.