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    • 2. 发明申请
    • SILICON CARBIDE-BASED POROUS BODY
    • 基于碳化硅的多孔体
    • US20090155528A1
    • 2009-06-18
    • US12329846
    • 2008-12-08
    • Masaaki KAWAI
    • Masaaki KAWAI
    • B32B3/12B32B5/02
    • C04B35/565C04B35/6316C04B38/0006C04B2111/00793C04B2235/3418C04B2235/3891C04B2235/404C04B2235/428C04B2235/5436C04B2235/80C04B2235/96C04B2235/9607Y10T428/24149C04B38/0054C04B38/0074
    • There is provided a silicon carbide-based porous body which can avoid excessive temperature elevation when it is used as a filter and the captured particulate matter (PM) is burnt for removal and which is low in strength reduction caused by heat cycle. The silicon carbide-based porous body comprises a plurality of silicon carbide (SiC) particles as an aggregate and a plurality of binding phases which bind the silicon carbide particles to each other, wherein of the binding phases, the phase having the largest volume is either of a Si phase and a phase (a metal silicide phase) made of at least one member selected from the group consisting of a Ti silicide, a Zr silicide, a Mo silicide and a W silicide, all having a linear thermal expansion coefficient at 40 to 800° C., higher than that of Si by at least 3×10−6 (° C.−1) and the phase having the next largest volume is the remainder of the Si phase and the metal silicide phase, and the binding phases contain the Si phase by 20 to 80% by volume of the total binding phases.
    • 提供了一种碳化硅基多孔体,其可以在用作过滤器时避免过高的温度升高,并且捕获的颗粒物质(PM)被燃烧以进行除去,并且由热循环引起的强度降低低。 碳化硅基多孔体包括多个作为骨料的碳化硅(SiC)颗粒和将碳化硅颗粒彼此结合的多个结合相,其中结合相中具有最大体积的相是 的Si相和由选自由Ti硅化物,Zr硅化物,Mo硅化物和W硅化物组成的组中的至少一种构成的相(金属硅化物相),其全部具有40的线性热膨胀系数 至800℃,高于Si的至少3×10 -6(℃-1),并且具有次最大体积的相是Si相和金属硅化物相的剩余部分,并且结合相包含 Si相为总结合相的20〜80体积%。