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发明授权
CN106431417B 一种高硬度高韧性B4C-W2B5-C复合陶瓷及其制备方法 有权

一种高硬度高韧性B4C-W2B5-C复合陶瓷及其制备方法
摘要：
本发明公开了一种高硬度高韧性B4C‑W2B5‑C复合陶瓷，W2B5和C均匀分布于基体B4C中，其中B4C和W2B5的摩尔比为1:4，C的体积占产物总体积的5～10vol％。其制备方法为：按照摩尔比为17:2:2的比例称取硼粉、石墨粉和WC粉，然后再添加以上粉末总体积5～10vol％的石墨粉，使用球磨机干磨，再预压成型；最后置于烧结炉中，保证烧结压力为30Mpa，1000℃～1200℃范围内保温3‑5min，1400～1550℃范围内保温3‑5min，1700℃保温6‑10min即得。本发明复合陶瓷致密化温度仅1700℃，高断裂韧性(7.8～11.9MPa·mm1/2)。
摘要（英）：

The invention discloses a high-hardness high-toughness B4C-W2B5-C composite ceramic. W2B5 and C are uniformly distributed in the matrix B4C, wherein the mole ratio of the B4C to the W2B5 is 1:4, and the C accounts for 5-10 vol% of the total product. The preparation method comprises the following steps: weighing boron powder, graphite powder and WC powder according to the mole ratio of 17:2:2, adding graphite powder which accounts for 5-10 vol% of the total powder above, carrying out dry milling by using a ball mill, and carrying out pre-press forming; and finally, putting in a sintering furnace, keeping the temperature at 1000-1200 DEG C for 3-5 minutes while ensuring the sintering pressure at 30 MPa, keeping the temperature at 1400-1550 DEG C for 3-5 minutes, and keeping the temperature at 1700 DEG C for 6-10 minutes. The compaction temperature of the composite ceramic is 1700 DEG C, and the fracture toughness is up to 7.8-11.9 MPa.mm<1/2>.

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