Invention Grant
- Patent Title: High-density pressurelessly sintered zirconium diboride/silicon carbide composite bodies and a method for producing the same
- Patent Title (中): 高密度无压烧结二硼化锆/碳化硅复合体及其制造方法
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Application No.: US12201704Application Date: 2008-08-29
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Publication No.: US08097548B2Publication Date: 2012-01-17
- Inventor: Shi C. Zhang , Gregory E. Hilmas , William G. Fahrenholtz
- Applicant: Shi C. Zhang , Gregory E. Hilmas , William G. Fahrenholtz
- Agent C. John Brannon
- Main IPC: C04B35/81
- IPC: C04B35/81 ; C04B35/58

Abstract:
A method of sintering a ZrB2—SiC composite body at ambient pressures, including blending a first predetermined amount of ZrB2 powder with a second predetermined amount of SiC powder, wherein both powders are characterized by the presence of surface oxide impurities. Next the blended powders are mixed to yield a substantially homogeneous powder mixture and a portion of the substantially homogeneous powder mixture is formed into a green body. The body is fired to a first temperature, wherein substantially all surface oxide impurities are reduced and/or volatilized to substantially eliminate oxides from the green body, and the body is heated to a second temperature and sintered to yield a composite body of at least about 99 percent theoretical density (more typically at least about 99.5 percent theoretical density) and characterized by SiC whisker-like inclusions distributed substantially evenly in a ZrB2 matrix.
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