Preparation and properties of hollow glass microspheres reinforced Mg alloy degradable composites

JOURNAL OF ALLOYS AND COMPOUNDS

卷:835

Article

Liu, Lin¹  Yu, Sirong¹  Niu, Yafeng¹  Liu, Enyang¹ 

[1] China Univ Petr East China, Sch Mat Sci & Engn, Qingdao 266580, Peoples R China

关键词: Degradable composite;    Mg alloy;    Hollow glass microspheres;    Mechanical property;    Degradable behavior;   

DOI  :  10.1016/j.jallcom.2020.155198

来源: Elsevier

【 摘 要 】

To obtain low density degradable materials used as degradable fracturing balls and bridge plugs applied to the unconventional oil and gas exploitation, the HGM/Mg alloy degradable composites with various amounts of hollow glass microspheres (HGMs) were manufactured using the stir casting method. The effects of the HGMs addition on the microstructures, mechanical properties and degradation behaviors of the composites were investigated. The results indicate that the density of the composite is significantly reduced compared to the matrix alloy and the density decreases with the HGMs content increasing. When the addition of HGMs is less than 3 wt%, the compressive strength of the composites was enhanced with the increase of the HGMs content due to the grain refinement and second phase strengthening. The composites with 3 wt% HGMs exhibit maximum compressive strength of 414.50 MPa. Adding HGMs is conducive to the formation of more corrosion micro-batteries in the composites and the exfoliation of degradation products during the degradation process, and thus dramatically improve the degradation rate of HGMs/Mg alloy degradable composites, the composites with 5 wt% HGMs have the highest average degradation rate of 97.37 mg cm(-2) h(-1). (C) 2020 Elsevier B.V. All rights reserved.

【 授权许可】

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