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发明授权
CN106811613B 一种高体积分数B4C与Si颗粒混合增强的铝基复合材料及其制备工艺 有权 转让

一种高体积分数B4C与Si颗粒混合增强的铝基复合材料及其制备工艺
摘要：
本发明公开了一种高体积分数B4C与Si颗粒混合增强的铝基复合材料及其制备工艺。该铝基复合材料由Al‑Cu‑Mg‑Co合金基体和B4C与Si的混合增强相组成，按体积百分比计，Al‑Cu‑Mg‑Co合金基体的含量为30‑45％，B4C的含量为55‑60％，Si的含量为a，0＜a≤10％。该铝基复合材料采用粉末冶金的方法制备，主要包括B4C与Si颗粒的预处理、增强相与Al合金基体粉体球磨混合、粉末冷等静压、真空除气、热等静压等步骤。本发明的铝基复合材料的密度为2.55～2.60g/cm3，抗弯强度为450～530MPa，弹性模量为180～220GPa，热膨胀系数为7.6～9.5×10‑6K‑1，热导率为70～100W/m·K；该材料的优异性能可以较好满足航天轻质高强结构功能件材料的使用要求。
摘要（英）：

The invention discloses a high-volume fraction B4C and Si particle mixing enhancement aluminum-based composite material and a preparation process thereof. The aluminum-based composite material is composed of an Al-Cu-Mg-Co alloy base body and a mixing enhancement phase of B4C and Si. By volume percent, the content of the Al-Cu-Mg-Co alloy base body is 30%-45%, the content of the B4C is 55%-60%, the content of the Si is a, and a is larger than zero and smaller than or equal to 10%. The aluminum-based composite material is prepared through a powder metallurgy method. The preparation process mainly comprises the steps of pretreatment of the B4C and Si particles, ball mill mixing of the enhancement phase and Al alloy base body powder, powder cold isostatic pressing, vacuum degassing, hot isostatic pressing and the like. The density of the aluminum-based composite material is 2.55-2.60 g/cm<3>, the bending strength is 450-530 MPa, the elastic modulus is 180-220 GPa, the thermal expansion coefficient is 7.6-9.5*10<-6>K<-1>, and the thermal conductivity is 70-100 W/m.K. The excellent performance of the aluminum-based composite material can well meet the using requirements of spaceflight light high-strength structure function part materials.

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