Investigation on preparation,microstructure,and properties of AgTiB2 composite

Abstract

AgTiB₂ composites with different contents of TiB₂ were prepared by high-energy milling and powder metallurgy. The morphology and size of the milled Ag/TiB₂ compound powders were characterized by a scanning electron microscopy and a laser particle analyzer. The effect of sintering temperature and TiB₂ content on the microstructure and properties of AgTiB₂ composite was studied. The results show that: (1) with increase of the milling time, the powders become finer and more uniform. Nevertheless, the powders begin to coarsen and agglomerate above a certain milling time. In the range of experiments, the desired powders with a relative uniform size can be obtained at 60 h; (2) the increase in TiB₂ content results in serious agglomerations of TiB₂ in the AgTiB₂ composites; and (3) the Ag—0.25 wt%TiB₂ composite has a good combination of properties after sintering at 750° C for 2 h, and the hardness and electrical conductivity are 73.3HV and 17.8 MS m^-1, respectively.

Keywords

Ag matrix composites powder metallurgy microstructure hardness electrical conductivity

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References

Wang BZ , Wang SE , Bai HZ and Yao F. The Designing of the Novel Ag-Metal Oxide Contact Materials Composition . J Hebei Univ Sci Technol 2001; 30(3): 77-81.

Xie M. , Yang YC , Li YS , Zhang JK , Fu SJ , Chen L. , Zeng RC and Yin CQ Silver Base Electrical Engineering Contact Materials and the Development of Cadmium Free New Materials. Precious Met 2006 ; 27(4): 61-66.

Joshi PB , Krishnan PS and Patel RH Improved PM Silver-Zinc Oxide Electrical Contacts. Int J Powder Metall 1998; 34(4): 63-68.

Guo ZP , Dong L. and Wang Y. Development and Present State of Ag Based Metal Oxide Contact Materials . Electr Eng Mater 2007; 2: 35-38.

Du ZJ , Yang TZ , Gu YY and Qiu XY The Advances in Preparing Methods and Application of AgSnO2 Contact Material . Mater Rev 2005; 19(2): 39-42.

Zhou ZF and Gan WP Development of AgSnO2 Contact Material. Rare Met Cement Carbides 2004; 32(2): 53-56.

Swingler J. and McBride JW Erosion and Arc Characteristics of AgCdO and AgSnO2 Contact Materials under DC Break Conditions, Electrical Contacts , In: Proceedings of the Annual Holm Conference on Electrical Contacts, Montreal, Canada, 1995, pp. 381-392.

Liu XM , Wu SL , Paul K. , Chung CY , Zheng J. and Li SL Effects of Coating Process on the Characteristics of AgSnO2 Contact Materials . Mater Chem Phys 2006; 98(2-3): 477-480.

Hetzmanseder E. and Rieder W. Make and Break Erosion of AgMeO Contact Materials . IEEE Trans Compon Packag Manuf Technol Part 1996; 19(3): 397-403.

10.

Didier J. , Jacques P. , Pierre R. and Ernest MJ Physical and Chemical Properties of Metal Oxide Additions to AgSnO2 Contact Material and Predictions Electrical Performance. IEEE Trans Compon Packag Manuf Technol Part A 1994; 17(1): 17-23.

11.

Ye JJ , Xiong WH , Xu J. , Fu JH and Li ZB Research Progress in AgSnO2 Contact Material in Low-voltage Relay . Mater Rev 2007; 21(2): 87-90.

12.

Chen ZK and Witter G. The Effect of Silver Composition and Additives on Switching Characteristics of Silver Tin Oxide Type Contacts for Automotive Inductive Loads Electrical Contacts, In: Proceedings of the 51st IEEE Holm Conference on Electrical Contacts (IEEE Cat. no. 05CH37677), Chicago, United States, 2005, pp. 35-41.

13.

Rong MZ , Feng JX and Yang W. Contact Arc Erosion of Low Voltage Apparatus. Low Vol Apparatus 1998; 1: 13-16.

14.

Zheng J. , Li SL , Gao HX and Li QY Study on Ag-SnO2 Nanocrystalline Powder for Electric Contact Material . Rare Met Mater Eng 2003; 32(10): 829-831.

15.

Jian DX , Zheng J. , Li QY and Xu SL Study on AgSnO2 Contact Materials with High Energy Ball Milling. Electr Eng Mater 2004; 3: 3-6.

16.

Yin N. , Liu XY , Hou Z. and Wang CJ Electrical Contact Materials of Ag-based Conductive Ceramic. Electr Eng Mater 2004; 1: 3-6.

17.

Guan WM , Zhang KH , Lu F. , Zheng FQ , Zhang GQ and Lu HB Preparation and Performance of the Novel Electrical Contact Materials of Silver-metal Oxides. Precious Met 2002; 23(1): 26-28.

18.

Zhu YC , Wang JQ and Wang HT Study on the AgSnO2- La2O3 Contact Material. J Electr Eng Mater 2006; 3: 3-5.

19.

Rong MZ , Wan JW and Wang QP Erosion Mechanism of AgSnO2 Contact Material with Different Dopants . J Xi’an Jiaotong University 1997 ; 31: 1-6.

20.

Du YG , Yang G. , Zhang JC , Long Y. and Wang GH Analysis on Physical Metallurgy Process of AgMeO Contact Materials during the Arc-electrode Interaction. Electr Eng Mater 1997; 4: 1-8.

21.

Liu FF , Chen JC , Guo YC , Geng YH and Guan WM Investigation on Arc Erosion Performances of AgSnO2 Electrical Contact Materials Fabricated by Reactive Synthesis. Precious Met 2007; 28(3): 24-28.

22.

Zhang Y. , Wang JB , Li YM , Cheng LC , Yang MG and Ding BJ Study of Nanocomposite Silver-based Contact Materials and Additives . Mater Rev 2005; 19(5): 34-37.

23.

Wang JQ Study on a New Contact Material AgSnO2La2O3-Bi2O3. IEEE Trans CPMT 2001; 24(1): 94-98.

24.

Lorrain N. , Chaffron L. , Carry C. , Delcroix P. and Le Caër G. Kinetics and Formation Mechanisms of the Nanocomposite Powder Ag-SnO2 Prepared by Reactive Milling. Mater Sci Eng A 2004; 367: 1-8.

25.

Huang DP , Jia CC , Chen XH , Zhou C. and Qu XH Preparation of Ag Based Rare Earth Oxide Contact Material. Powder Metall Technol 2005; 23(6): 423-426.

26.

Herman DM , Cao GH , Becker AT , Russell AM and Constant AP Microstructure and Properties of a Silver-Cerium Oxide Alloy. J Alloys Compd 2008; 454: 292-296.

27.

Wu CP , Yi DQ , Chen JC , Li J. , Wang B. and Fang XY Microstructure and Physical Performances of Silver Rare Earth Oxide Electrical Contact Materials Prepared by Internal Oxidation. J Central South University (Science and Technology) 2007; 38(2): 232-237.

28.

Bhaumik SK , Divakar C. , Singh AK and Upadhyaya GS Synthesis and Sintering of TiB2 and TiB2-TiC Composite under High Pressure . Mater Sci Eng A 2000; 279: 275-281.

29.

Degnan CC and Shipway PH The Incorporation of Self-propagating, High-temperature Synthesis-formed FeTiB2 into Ferrous Melt. Metall Mater Trans A 2002 ; 33: 2973-2983.

30.

Tu JP , Wang NY , Yang YZ , Qi WX , Liu F. , Zhang XB , Lu HM and Liu MS Preparation and Properties of TiB2 Nanoparticle Reinforced Copper Matrix Composites by In Situ Processing. Mater Lett 2002; 52: 448-452.

31.

Ciuman-Krzemień A. , Burzynska L. and Galanty M. Selection of Optimum Parameters to Obtain AgTiB2 Composite Electrical Contacts. Powder Metall 2009; 52(1): 49-60.

32.

Xie GH , Li SC and Wang WX Quantitatively Metallographic Analysis on the Spatial Uniformity of Particles in Particle Strengthening Metal Matrix Composite. Phys Test Chem Anal Part A: Physical Testing 1995; 31(1): 36-38.

33.

Liu ZE Foundation of Materials Science. Xi’an: Northwestern Polytechanical University Press, 2002.

34.

Huang PY Principle of Powder Metallurgy. Beijing: Metallurgical Industry Press, 1982.