Microstructure and properties of Ag–Ti3SiC2 contact materials prepared by pressureless sintering

Zhang, Min; Tian, Wenbin; Zhang, Pei-gen; Ding, Jianxiang; Zhang, Yamei; Sun, ZhengMing

doi:10.1007/s12613-018-1629-0

Cited by 28 publications

(7 citation statements)

References 32 publications

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“…The synthesis of high-purity MAX phase powders will bene t to the production of MAX components with complicated structures via ceramic processing like slip casting, and also the development of MAX-reinforced composites. For instance, MAX phase can be used as the reinforcements for metal-based electrical contacts [16][17][18][19][20][21], where the synthesis of high-purity MAX powder is the prerequisite for the developments of high-performance Ag-MAX composites.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Ti3GeC2 Powders from Ti-Ge-TiC Mixtures by Pressureless Sintering

Qiaodan¹,

Tian²,

Sun³

et al. 2020

Preprint

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Ti3GeC2 compound has excellent electrical and mechanical properties, which can be used as a potential reinforcement for Ag-based electrical contact materials. However, few reports have been addressed on the synthesis of its powders. The present study, therefore, presents a new route to fabricate high-purity Ti3GeC2 powders from Ti/Ge/TiC by pressureless sintering in vacuum. The influence of sintering temperature and Ge content on the powder purity was studied and the optimized conditions are found to be 1550 ℃ and Ti:Ge:TiC=1:1.1:2. In addition, the reaction path of Ti/Ge/TiC was revealed to be three steps: First, liquid Ge starts to react with Ti to form Ti5Ge3 compounds at around 1140 ℃; Then Ti5Ge3 consumes the liquid Ge and TiC to form Ti2GeC at around 1200 ℃; Finally, Ti2GeC transfers into Ti3GeC2 with the consumption of residual TiC. The present study lays the foundation for the subsequent applications of Ti3GeC2 powders in high performance composites.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Ti3GeC2 Powders from Ti-Ge-TiC Mixtures by Pressureless Sintering

Qiaodan¹,

Tian²,

Sun³

et al. 2020

Preprint

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“…Previous work showed that Ti 3 AlC 2 material had the effect of dispersing arc under atmospheric conditions, and the dispersing effect was better with higher Ti 3 AlC 2 content [17,18,20,21]. Sun et al [19,22,23,24,25,26] systematically studied the wettability between the Ag and MAX phases. It was found that the wettability angles between Ag and MAX were 14°, 18°, and 72°.…”

Section: Introductionmentioning

confidence: 99%

Erosion Behavior of a Cu-Ti3AlC2 Cathode by Multi-Electric Arc

Huang

Feng

et al. 2019

Materials

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A Cu-Ti3AlC2 cathode was eroded by arc discharging at 10 kV. The cross-sectional and horizontal morphologies of the eroded surface were recorded by a field emission scanning electron microscope (FE-SEM). The energy dispersive X-ray spectroscopy (EDS) and Raman spectrometry were carried out to analyze the compositions. The color-eroded surface was obtained by a three-dimensional laser scanning confocal microscope (3D LSCM). After 100 times of arc erosion, the Cu-Ti3AlC2 melted and resolidified. An eroded layer about 10 μm thick was formed, covered with pits, protrusions, and pores. The breakdown current was kept between 37 to 43 A. Under the action of a high temperature arc, Cu-Ti3AlC2 was oxidized to CuO and TiO2, accompanying the evaporation of the Al element.

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“…However, Cd is a toxic element, and the concept of "cadmium free" has been clearly proposed in some newly designed electric contact materials. By consulting a large amount of literature, we attempt Cu as the matrix metal to add SiC, SnO 2 or ZnO 2 powders, and used hot-pressing powder sintering and hot extrusion processes 18,19 to prepare a School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot 010051, China two types of products. The Cu-SnO 2 and Cu-ZnO 2 contact materials were designed to follow the principle of non-toxic and environmental protection.…”

Section: Introductionmentioning

confidence: 99%

Contrastive Research on Electrical Contact Performance for Contact Materials of Cu-SnO2 and Cu-ZnO2 Alloys

et al. 2019

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Herein, SnO 2 -and ZnO 2 -doped (1.5 wt.%) composite Cu powder was prepared by mechanical alloying (MA) respectively, and both the contact materials of oxide-doped Cu alloys were subsequently obtained by canned hot-pressing powder sintering with hot extrusion combined. Scanning electron microscopy (SEM), laser scanning confocal microscopy (LSCM) and self-designed electrical breakdown device were used for investigating the microstructure and properties including electric conductivity and hardness, especially for electrical contact performance of the Cu-SnO 2 alloy and in compared with the Cu-ZnO 2 alloy. The experimental results show that the hardness of Cu-SnO 2 and Cu-ZnO 2 contact materials are 103.5±1 HV and 192.7±1 HV, respectively, which meet the hardness standard of national standard electrical contact materials. Meanwhile, the relative conductivity %IACS are 7.24% and 6.20%, respectively, which are higher than the traditional Cu-based contact materials. This electrical life simulation test system was designed independently, and the results indicate that the switching times of Cu-SnO 2 contact materials are much more than that of Cu-ZnO 2 . The addition of SnO 2 can effectively improve the arc extinguishing characteristics and the anti-welding performance of the contact materials is enhanced. In summary, SnO 2 -doped Cu-based contact materials possess excellent comprehensive properties, which can provide reference for potential applications in contact materials.

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Microstructure and properties of Ag–Ti3SiC2 contact materials prepared by pressureless sintering

Cited by 28 publications

References 32 publications

Synthesis of Ti3GeC2 Powders from Ti-Ge-TiC Mixtures by Pressureless Sintering

Synthesis of Ti3GeC2 Powders from Ti-Ge-TiC Mixtures by Pressureless Sintering

Erosion Behavior of a Cu-Ti3AlC2 Cathode by Multi-Electric Arc

Contrastive Research on Electrical Contact Performance for Contact Materials of Cu-SnO2 and Cu-ZnO2 Alloys

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