(河北工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院，天津 300130)
摘 要: 提出一種新型的熔體攪拌鑄造工藝，解決了Al-Si合金對(duì)10μm級(jí)以下高體積分?jǐn)?shù)TiN，AlN陶瓷的非真空無(wú)壓浸潤(rùn)問(wèn)題，并在此基礎(chǔ)上成功制備了高強(qiáng)度低成本的TiN-AlNp/Al-Si復(fù)合材料。研究表明， 細(xì)小TiN，AlN顆粒在鋁熔體中已經(jīng)實(shí)現(xiàn)了潤(rùn)濕，平均尺寸在2～3μm，基本呈均勻分布，與基體結(jié)合良好。當(dāng)TiN，AlN的含量為10% (體積分?jǐn)?shù))時(shí)，復(fù)合材料的抗拉強(qiáng)度為335MPa，屈服強(qiáng)度為240MPa，延伸率為2.4%。
關(guān)鍵字: 鋁基復(fù)合材料；TiN；AlN；潤(rùn)濕性
composites with high strength
MENG Fan-bin, WANG Ru
（School of Materials Science & Engineering，
Hebei University of Technology，Tianjin 300130，China）
Abstract:A new technology of melt stirring and casting was presented to improve the wettability of TiN and AlN particles less than 10μm with high volume fraction in Al-Si alloy melt at non-vacuum and free-pressure condition. Based on this technology the TiN-AlNp/Al-Si composites with high strength and low cost were fabricated successfully. The results indicate that fine TiN and AlN ceramic particles with the size of 2～3μm have realized wetting with Al-Si melt. The particles basically assume an even distribution and a well bonding with the aluminum matrix. The main properties of the composite with 10% (volume fraction) TiN and AlN are as follows: ultimate tensile strength is 335MPa, yield strength 240MPa and elongation coefficient 2.4%.
Key words: aluminum matrix composite；titanium nitride；aluminum nitride；wettability
