Sialon-based sintered body and process for producing same
Patent 5200374 Issued on April 6, 1993. Estimated Expiration Date: 
April 5, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 5, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethods of forming ceramic materials and ceramic products, and ceramic materials and ceramic products formed thereby Sialon-base ceramic materials excellent in wear resistance Ceramic material and method of manufacture Nitride-based ceramic material High density high strength alpha sialon based article and process for producing same Patent #: 5032553 InventorsAssigneeApplicationNo. 680944 filed on 04/05/1991US Classes:501/98.2With rare earth or alkaline earth metal compoundExaminersPrimary: Bell, Mark L.Assistant: Jones, Deborah Attorney, Agent or FirmInternational ClassC04B 035/58Foreign Application Priority Data1990-04-06 JPAbstractA SiAlON-based sintered body having a high mechanical strength and fracture toughness, as well as an excellent oxidation resistance, is provided. The SiAlON-based sintered body comprises 5 to 50% by weight of a first crystal phase of RE-SiAlON represented by REx (Si, Al)12 (O, N)16, where RE stands for at least one modifying rare earth element selected from the group consisting of Ho, Er, Tm, Yb and Lu and x has a value of 0<xࣘ2, 30 to 90% by weight of a second crystal phase of ଲ-SiAlON represented by Si6-z Alz Oz N8-z (0<zࣘ4.2), and 1 to 50% by weight of a third crystal phase containing at least one rare earth element RE selected from the group consisting of Ho, Er, Tm, Yb and Lu, optionally together with 1 to 20% by weight of a crystal phase of -silicon nitride. | |
