Nanostructured Al-ZrAl3 materials consolidated via spark plasma sintering: Evaluation of their mechanical properties

JOURNAL OF ALLOYS AND COMPOUNDS

卷:550

Article

Rodriguez, C.²  Belzunce, F. J.²  Betegon, C.²  Goyos, L.¹  Diaz, L. A.¹  Torrecillas, R.¹ 

[1] Univ Oviedo Principado Asturias, Consejo Super Invest Cient, Ctr Invest Nanomat & Nanotecnol CINN CSIC UNIOVI, Llanera, Spain

[2] Univ Oviedo, Escuela Politecn Ingn, Gijon 33203, Spain

关键词: Al alloys;    Spark plasma sintering;    Nanocomposites;    Mechanical properties;    Small Punch Test;   

DOI  :  10.1016/j.jallcom.2012.10.143

来源: Elsevier

【 摘 要 】

Aluminium based nanostructured materials with additions of 0.5, 1 and 1.5 wt.% of zirconium have been produced and sintered using the spark plasma sintering technique in order to promote the nucleation of ZrAl3 platelets. The mechanical behaviour of all these nanocomposites was determined by means of the Small Punch Test. Zirconium additions significantly decrease the mechanical properties of these products when sintering time at the sintering temperature (625 degrees C) is short (3 min). Nevertheless, when the sintering time increases to 1 h (intermetallic crystallization), the zirconium additions show the expected effect: the stiffness and the yield strength increase while ductility and toughness decrease. The maximum load increases until a 0.5 wt.% Zr is attained and suddenly drops when the Zr content surpasses 1 wt.%. (C) 2012 Elsevier B.V. All rights reserved.

【 授权许可】

Free