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首页> 外文期刊>Materials Science and Engineering >Thermal expansion and mechanical properties of pure magnesium containing zirconium tungsten phosphate particles with negative thermal expansion
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Thermal expansion and mechanical properties of pure magnesium containing zirconium tungsten phosphate particles with negative thermal expansion

机译：含负热膨胀的纯镁磷酸锆钨颗粒的热膨胀和力学性能

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摘要

The magnesium composites containing Zr_2(WO_4)(PO_4)_2 (ZWP) particles with negative thermal expansion (NTE) were synthesized. Dense, unreacted Mg/ZWP composites were fabricated by extruding the two component powders. The coefficient of thermal expansion (CTE) and the mechanical properties of the composites were examined. The CTE of Mg/ZWP composites decreased with an increase in the amount of ZWP in the composites, though the effect was not significant probably because of the low bulk modulus of ZWP. Although there was a tension-compression asymmetry in the room temperature yield strength of Mg without ZWP, the difference reduced in the composites. The decreased asymmetry of yield behavior was suggested to be resulting from the tensile residual stress in the matrix produced during fabrication process because of the NTE of ZWP.
机译：合成了具有负热膨胀（NTE）的Zr_2（WO_4）（PO_4）_2（ZWP）颗粒的镁复合材料。通过挤出两种成分的粉末，制备了致密的，未反应的Mg / ZWP复合材料。研究了复合材料的热膨胀系数（CTE）和机械性能。 Mg / ZWP复合材料的CTE随复合材料中ZWP含量的增加而降低，尽管效果不明显，可能是由于ZWP的低体积模量。尽管没有ZWP的Mg的室温屈服强度存在拉伸-压缩不对称性，但复合材料中的差异减小了。由于ZWP的NTE，制造过程中产生的基体中的拉伸残余应力导致屈服行为的不对称性降低。

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