Methods 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
ApplicationNo. 680944 filed on 04/05/1991
US Classes:501/98.2With rare earth or alkaline earth metal compound
ExaminersPrimary: Bell, Mark L.
Assistant: Jones, Deborah
Attorney, Agent or Firm
International ClassC04B 035/58
Foreign Application Priority Data1990-04-06 JP
AbstractA 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.