Preparation and arc erosion properties of Ag/Ti_2SnC composites under electric arc discharging
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摘要
New Ag/Ti_2 SnC(Ag/TSC) composites with uniform microstructure were prepared by powder metallurgy. The superior wettability between Ag and Ti_2 SnC was confirmed with a contact angle of 14°. Arc erosion properties of Ag/10 wt%Ti_2 SnC(Ag/10 TSC) and Ag/20 wt%Ti_2 SnC(Ag/20 TSC) contacts were investigated under 400 V/100 A/AC-3 and compared with Ag/CdO contact.The Ag/10 TSC contact exhibited comparable arc erosion property to Ag/CdO contact. The fine arc erosion resistance was attributed to the good wettability between Ti_2 SnC and Ag,the good heat-conducting property of Ag/10 TSC, and the slight decomposition of Ti_2 SnC that absorbed part of electric arc energy. The excessive Ti_2 SnC significantly decreased the thermal conducting property of the Ag/20 TSC composite, resulting in the severe heat accumulation that decomposed Ti_2 SnC and deteriorated arc erosion property. The oxidation behavior of Ti_2 SnC under high electric arc temperature was also studied and then an arc erosion mechanism was proposed to get a comprehensive understanding on the arc erosion property of Ag/TSC composites.
New Ag/Ti_2 SnC(Ag/TSC) composites with uniform microstructure were prepared by powder metallurgy. The superior wettability between Ag and Ti_2 SnC was confirmed with a contact angle of 14°. Arc erosion properties of Ag/10 wt%Ti_2 SnC(Ag/10 TSC) and Ag/20 wt%Ti_2 SnC(Ag/20 TSC) contacts were investigated under 400 V/100 A/AC-3 and compared with Ag/CdO contact.The Ag/10 TSC contact exhibited comparable arc erosion property to Ag/CdO contact. The fine arc erosion resistance was attributed to the good wettability between Ti_2 SnC and Ag,the good heat-conducting property of Ag/10 TSC, and the slight decomposition of Ti_2 SnC that absorbed part of electric arc energy. The excessive Ti_2 SnC significantly decreased the thermal conducting property of the Ag/20 TSC composite, resulting in the severe heat accumulation that decomposed Ti_2 SnC and deteriorated arc erosion property. The oxidation behavior of Ti_2 SnC under high electric arc temperature was also studied and then an arc erosion mechanism was proposed to get a comprehensive understanding on the arc erosion property of Ag/TSC composites.
New Ag/Ti_2 SnC(Ag/TSC) composites with uniform microstructure were prepared by powder metallurgy. The superior wettability between Ag and Ti_2 SnC was confirmed with a contact angle of 14°. Arc erosion properties of Ag/10 wt%Ti_2 SnC(Ag/10 TSC) and Ag/20 wt%Ti_2 SnC(Ag/20 TSC) contacts were investigated under 400 V/100 A/AC-3 and compared with Ag/CdO contact.The Ag/10 TSC contact exhibited comparable arc erosion property to Ag/CdO contact. The fine arc erosion resistance was attributed to the good wettability between Ti_2 SnC and Ag,the good heat-conducting property of Ag/10 TSC, and the slight decomposition of Ti_2 SnC that absorbed part of electric arc energy. The excessive Ti_2 SnC significantly decreased the thermal conducting property of the Ag/20 TSC composite, resulting in the severe heat accumulation that decomposed Ti_2 SnC and deteriorated arc erosion property. The oxidation behavior of Ti_2 SnC under high electric arc temperature was also studied and then an arc erosion mechanism was proposed to get a comprehensive understanding on the arc erosion property of Ag/TSC composites.
引文
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[2]Hao X,Wang X,Zhou S,et al.Microstructure and properties of silver matrix composites reinforced with Agdoped graphene.Mater Chem Phys 2018,215:327-331.
[3]Nilsson O,Hauner F,Jeannot D.Replacement of Ag Cd Oby Ag Sn O2 in DC contactors.In Proceedings of the 50th IEEE Holm Conference on Electrical Contacts and the22nd International Conference on Electrical Contacts,2004:70-74.
[4]Wang X,Li G,Zou J,et al.Investigation on preparation,microstructure,and properties of Ag Ti B2 composite.JCompos Mater 2011,45:1285-1293.
[5]?leziona J,Wieczorek J,Dyzia M.Mechanical properties of silver matrix composites reinforced with ceramic particles.Journal of Achievements in Materials and Manufacturing Engineering 2006,17:165-168.
[6]Barsoum MW.The MN+1AXN phases:A new class of solids:Thermodynamically stable nanolaminates.Prog Solid State Chem 2000,28:201-281.
[7]Ding J,Tian WB,Zhang P,et al.Arc erosion behavior of Ag/Ti3Al C2 electrical contact materials.J Alloys Compd2018,740:669-676.
[8]Jeitschko W,Nowotny H,Benesovsky F.Carbides of formula T2MC.J Less-Common Met 1964,7:133-138.
[9]Barsoum MW,Yaroschuk G,Tyagi S.Fabrication and characterization of M2Sn C(M=Ti,Zr,Hf and Nb).Scripta Mater 1997,37:1583-1591.
[10]El-Raghy T,Chakraborty S,Barsoum MW.Synthesis and characterization of Hf2Pb C,Zr2Pb C and M2Sn C(M=Ti,Hf,Nb or Zr).J Eur Ceram Soc 2000,20:2619-2625.
[11]Zhou Y,Dong H,Wang X,et al.Preparation of Ti2Sn C by solid-liquid reaction synthesis and simultaneous densification method.Mater Res Innov 2002,6:219-225.
[12]Wu J,Zhou Y,Yan C.Mechanical and electrical properties of Ti2Sn C dispersion-strengthened copper.Zeitschrift für Metallkunde 2005,96:847-852.
[13]Lu JR,Zhou Y,Zheng Y,et al.Interface structure and wetting behaviour of Cu/Ti3Si C2 system.Adv Appl Ceram2015,114:39-44.
[14]Wang Y,Li H.Improved workability of the nanocomposited Ag Sn O2 contact material and its microstructure control during the arcing process.Metall Mater Trans A 2017,48:609-616.
[15]Wang J,Liu W,Li D,et al.The behavior and effect of Cu Oin Ag/Sn O2 materials.J Alloys Compd 2014,588:378-383.
[16]Ding J,Zhang P,Tian WB,et al.The effects of Sn content on the microstructure and the formation mechanism of Ti2Sn C powder by pressureless synthesis.J Alloys Compd2017,695:2850-2856.
[17]Karakaya I,Thompson WT,The Ag-Sn(silver-tin)system.Bulletin of Alloy Phase Diagrams 1987,8:340-347.
[18]Zhou YC,Dong HY,Wang XH.High-temperature oxidation behavior of a polycrystalline Ti2Sn C ceramic.Oxid Met 2004,61:365-377.