以碳纳米管为增强相,WC-10Co硬质合金为基体,采用湿法球磨工艺将多壁碳纳米管(Multi walled carbon nanotubes,MWCNTs)和WC-10Co硬质合金粉料充分混合,通过真空烧结制成CNTs增强的WC-10Co硬质合金试样.采用SEM观测MWCNT在硬质合金基体中的分布和烧结后硬质合金微观结构.SEM显示碳纳米管嵌插在WC晶粒之间,抑制WC晶粒生长,使WC晶粒得到细化.试样横向断裂强度达到1 780 MPa,对比未增强试样提高了7.8％.
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