文章信息/Info

Title:

Fabrication of magnesium carbon multilayered composites by accumulative roll-bonding

作者:

李天龍1; 2; 3; 樊建鋒1; 2; 3; 張華1; 2; 3; 董洪標(biāo)1; 2; 3; 許并社1; 2; 3

1.新材料界面科學(xué)與工程教育部重點(diǎn)實(shí)驗(yàn)室，太原理工大學(xué)，山西 太原 030024； 2.山西省新材料工程技術(shù)研究中心，太原理工大學(xué)，山西 太原 030024； 3.太原理工大學(xué)材料科學(xué)與工程學(xué)院，山西 太原 030024

Author(s):

Li Tianlong1; 2; 3; Fan Jianfeng1; 2; 3; Zhang Hua1; 2; 3Dong Hongbiao1; 2; 3;  Xu Bingshe1; 2; 3

1. Key laboratory of interface science and engineering in advanced materials, Ministry of Education, Taiyuan University of Technology; Taiyuan 030024, China; 2. Shanxi research center of advanced materials science and technology, Taiyuan University of Technology; Taiyuan 030024, China; 3. College of material science and technology, Taiyuan university of technology, Taiyuan 030024, China

關(guān)鍵詞:

AZ31鎂合金; 累積疊軋; 碳納米管; 多層材料

DOI:

10.7502/j.issn.1674-3962.2015.05.07

文獻(xiàn)標(biāo)志碼:

A

摘要:

當(dāng)前鎂合金的研究主要集中于鎂合金及其復(fù)合材料的制備與加工，但對(duì)制備輕金屬納米多層復(fù)合材料的研究很少。本文通過(guò)在鎂合金板之間插嵌鎂粉與多臂碳納米管(CNTS)的球磨混合粉，然后在一定溫度下采用累積疊軋(ARB)的方法，制備鎂碳多層復(fù)合材料。分別用掃描電鏡和光學(xué)顯微鏡來(lái)表征累積疊軋過(guò)程中材料微觀組織的演變。結(jié)果表明本文所采用的工藝制備出了層界面之間機(jī)械結(jié)合較好的鎂碳多層復(fù)合材料，由于部分鎂合金層之間存在融合現(xiàn)象，其理論層厚為685 nm，實(shí)際層厚約為4μm。另外，在反復(fù)動(dòng)態(tài)再結(jié)晶和層界面對(duì)晶粒長(zhǎng)大的阻礙作用的共同作用下，材料中較薄的鎂合金層具有較細(xì)小的晶粒。

Abstract:

The current studies on magnesium alloy focused on the preparation of magnesium alloy and its composite materials, and the preparation of light metal nano-multilayer composites was rarely studied. In this paper, magnesium carbon multilayer of materials was prepared by applying seven cycles of accumulative roll bonding under certain temperature to magnesium sheets coated with ball-milled Mg/CNTS powders.The evolution of the microstructure on the process of accumulative roll-bonding is respectively characterized by scanning electron microscope and optical microscopy. The results show that the interface bonding of the magnesium carbon multilayer of materials is mechanical bonding under the process used in this paper. The theoretical thickness of magnesia carbon multi-layer is about 685 nm, and the actual thickness is about 4 μm due to partial magnesium alloy layer integration. In addition, in the role of repeated dynamic recrystallization and layer interface on grain growth of obstacles, the material in a thin layer of magnesium alloy has a fine grain.