Development of 3D bicontinuous metal-intermetallic composites through subsequent alloying process after liquid metal dealloying  

作　　者：Jee Eun Jang Jihye Seong Soo-Hyun Joo Sung Hyuk Park 

机构地区：[1]School of Materials Science and Engineering,Kyungpook National University,Daegu 41566,Republic of Korea [2]Department of Materials Science and Engineering,Dankook University,Cheonan 31116,Republic of Korea

出　　处：《Journal of Magnesium and Alloys》2023年第11期4274-4281,共8页镁合金学报（英文）

基　　金：supported by the National Research Council of Science & Technology (NST) grant by the Korea Government (MSIT) (grant no.CRC23011-000);by the National Research Foundation of Korea (NRF) funded by the Ministry of Science,ICT,and Future Planning (MSIP,South Korea) (grant no.NRF-2021R1C1C1007645)。

摘　　要：This study presents a novel process for the fabrication of metal-intermetallic composites with a 3D bicontinuous structure, achieved through a combination of liquid metal dealloying(LMD) and subsequent alloying. Initially, porous Ti structures are produced using the LMD process, followed by immersion in a molten Mg-3Al(wt%) metal. Due to the higher thermodynamic miscibility of Al with Ti compared to Mg, the concentration of Al in the Ti matrix increases as the immersion time increases. This results in a sequential phase transition within the Ti matrix: α-Ti → Ti_(3)Al → Ti Al. The phase transition considerably affects the hardness and strength of the composite material,with the Mg-Ti_(3)Al-Ti Al composite exhibiting a maximum hardness nearly twice as high as that of the conventional Mg-Ti composite. This innovative process holds potential for the development of various bicontinuous metal-intermetallic composites.

关 键 词：Liquid metal dealloying Subsequent alloying Metal–intermetallic composite 3D bicontinuous structure HARDNESS 

分 类 号：TB33[一般工业技术—材料科学与工程]