摘要
The W-4.9 Ni-2.1 Fe-xDy_2 O_3 heavy alloy was fabricated by high-energy ball milling and spark plasma sintering(SPS)technique,and the microstructure,mechanical and friction behavior and anti-corrosion ability were investigated by scanning electron microscope(SEM),Rockwell hardness tester,X-ray diffraction(XRD),reciprocating friction and wear tester,electrochemical station,etc.The results show that the trace Dy_2 O_3 particles,which mainly distributes in the W-M(tungsten-matrix)interface and the tungsten matrix phase,can dramatically decrease the tungsten grain size and the amount of O and P impurities aggregating in the interface,promote the γ-(Ni,Fe)bonding phase and tungsten particles uniform distribution,and increase the relative density,hardness,and wear and corrosion resistance properties.But the excessive Dy_2 O_3 addition can make the inhibition effect weaken,resulting in the decrease in the comprehensive performances of the alloy.So,the amount of Dy_2 O_3 should be appropriate.When the adding amount of Dy_2 O_3 particles is 0.7 wt%,the comprehensive performances of the heavy alloy are the best.
The W-4.9 Ni-2.1 Fe-xDy_2 O_3 heavy alloy was fabricated by high-energy ball milling and spark plasma sintering(SPS)technique,and the microstructure,mechanical and friction behavior and anti-corrosion ability were investigated by scanning electron microscope(SEM),Rockwell hardness tester,X-ray diffraction(XRD),reciprocating friction and wear tester,electrochemical station,etc.The results show that the trace Dy_2 O_3 particles,which mainly distributes in the W-M(tungsten-matrix)interface and the tungsten matrix phase,can dramatically decrease the tungsten grain size and the amount of O and P impurities aggregating in the interface,promote the γ-(Ni,Fe)bonding phase and tungsten particles uniform distribution,and increase the relative density,hardness,and wear and corrosion resistance properties.But the excessive Dy_2 O_3 addition can make the inhibition effect weaken,resulting in the decrease in the comprehensive performances of the alloy.So,the amount of Dy_2 O_3 should be appropriate.When the adding amount of Dy_2 O_3 particles is 0.7 wt%,the comprehensive performances of the heavy alloy are the best.
引文
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