Processing and Properties of ZrB2-Cu Composites Sintered by Hot-Pressing Sintering

2014 ◽  
Vol 602-603 ◽  
pp. 447-450 ◽  
Author(s):  
Wei Shang ◽  
Hai Long Wang ◽  
Shi Jing Zhao ◽  
Xiao Tong Zhao ◽  
Hong Liang Xu ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Hot Pressing ◽  
Electrical Contact ◽  
High Wear Resistance ◽  
X Ray Diffraction ◽  
Contact Materials ◽  
Metal Plating ◽  
Electroless Metal Plating ◽  
Electrical Contact Materials ◽  
Hot Pressing Sintering

ZrB2-Cu composite is a new electrical contact materials in the integration of high conductivity, high wear resistance and good mechanical strength. In this paper, ZrB2-Cu composites were prepared by hot-pressing sintering at 800~900 °C under a pressure of 20 MPa.The densification of ZrB2-Cu composites was improved by the addition of nickel using an electroless metal plating technique. X-ray diffraction and scan electron microscopy were used to analyze the phase and microstructure of ZrB2-Cu composites. The results showed that ZrB2-Cu composites with 60 vol % Cu which was sintered at 900 °C had a higher relative density, highest flexural strength of 381 MPa and higher hardness of 2.16 GPa(HV). ZrB2-Cu composites with 50 vol % Cu which was sintered at 900 °C had higher flexural strength of 297 MPa and the highest hardness of 2.66 GPa.

Material transfer behavior of AgTiB2 and AgSnO2 electrical contact materials under different currents

2017 ◽  
Vol 114 ◽  
pp. 139-148 ◽  
Author(s):  
Hangyu Li ◽  
Xianhui Wang ◽  
Xiuhua Guo ◽  
Xiaohong Yang ◽  
Shuhua Liang
Keyword(s):  
Electrical Contact ◽  
Material Transfer ◽  
Contact Materials ◽  
Transfer Behavior ◽  
Electrical Contact Materials

Properties of doped Ag–SnO2 electrical contact materials with different SnO2 particle sizes

2018 ◽  
Vol 6 (1) ◽  
pp. 016558 ◽  
Author(s):  
Wang Haitao ◽  
Zhang Mei ◽  
Yang Menglin ◽  
Wang Jingqin ◽  
Zhu Yancai
Keyword(s):  
Electrical Contact ◽  
Particle Sizes ◽  
Contact Materials ◽  
Sno2 Particle ◽  
Electrical Contact Materials

Comparison of Mo-10Nb Alloy Target Materials Prepared by Different Techniques

2017 ◽  
Vol 726 ◽  
pp. 316-320 ◽  
Author(s):  
Jie Gao ◽  
You Jun Lu ◽  
Jun Feng Hou ◽  
Zhen Xia Yuan ◽  
Wen Luo ◽  
...  
Keyword(s):  
Hot Pressing ◽  
Element Distribution ◽  
Raw Material ◽  
Elemental Distribution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Alloy Target ◽  
Hot Pressing Sintering ◽  
Sintering Condition ◽  
Scanning Electron

The Mo powder and Nb powder was used as raw material, the Mo-10Nb alloy target was prepared by different sintering condition (non-pressure sintering and hot pressing sintering). The density, phase composition, microstructure and elemental distribution of Mo-10Nb alloy targets were determined by X-ray diffraction and scanning electron microscopy. The results showed that prepared by hot pressing Mo-10Nb alloy target density of 9.618 g/cm3, grain size 20 ~ 30μm, Mo and Nb element distribution.

scholarly journals Microstructure refinement and physical properties of Ag-SnO2 based contact materials prepared by high-energy ball milling

2013 ◽  
Vol 45 (2) ◽  
pp. 173-180 ◽  
Author(s):  
V. Cosovic ◽  
M. Pavlovic ◽  
A. Cosovic ◽  
P. Vulic ◽  
M. Premovic ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Physical Properties ◽  
Ball Milling ◽  
Electrical Contact ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Powder Metallurgy Method ◽  
Contact Materials ◽  
Energy Ball ◽  
Electrical Contact Materials

High energy ball milling was used in order to improve dispersion of metal oxide in Ag-SnO2 electrical contact materials. The processed Ag-SnO2 (92:8) and Ag-SnO2In2O3 (87.8:9.30:2.9) powder mixtures were subsequently consolidated to bulk solid pieces by conventional powder metallurgy method. The characterization of the prepared samples included microstructural analysis by XRD and SEM, as well as measurements of physical properties such as density, hardness and electrical conductivity. The results of X-Ray analysis point to reduction of crystallite size after milling of about ten times. Microstructures of sintered Ag-SnO2 and Ag-SnO2 In2O3 materials display very fine dispersion of the oxide components in silver matrix. Somewhat higher uniformity was obtained for Ag-SnO2 In2O3 material which was illustrated by results of SEM analysis and more consistent microhardness values. The obtained values of studied physical properties were found to be in accordance with observed higher dispersion of metal oxide particles and comparable to properties of commercial electrical contact materials of this type.

scholarly journals Nanostructured W-Cu Electrical Contact Materials Processed by Hot Isostatic Pressing

2014 ◽  
Vol 125 (2) ◽  
pp. 348-352 ◽  
Author(s):  
V. Tsakiris ◽  
M. Lungu ◽  
E. Enescu ◽  
D. Pavelescu ◽  
Gh. Dumitrescu ◽  
...  
Keyword(s):  
Electrical Contact ◽  
Hot Isostatic Pressing ◽  
Contact Materials ◽  
Isostatic Pressing ◽  
Electrical Contact Materials

Effect of BN Short Fiber Content on Mechanical Properties of ZrB2-SiC UHTCs

2012 ◽  
Vol 512-515 ◽  
pp. 706-709 ◽  
Author(s):  
Chang Ling Zhou ◽  
Yan Yan Wang ◽  
Zhi Qiang Cheng ◽  
Chong Hai Wang ◽  
Rui Xiang Liu
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Fracture Toughness ◽  
Scanning Electron Microscopy ◽  
Flexural Strength ◽  
Hot Pressing ◽  
Ceramic Composites ◽  
Short Fiber ◽  
Hot Pressing Sintering ◽  
Scanning Electron

ZrB2-20%volSiC ceramic composites with different volume of BN short fiber were fabricated by the hot-pressing sintering under 2000°C. The content of BN short fiber changed from 0 to 15vol%. The density, flexural strength, fracture toughness and thermal expansions coefficient were studied. The microstructures of the samples were observed by scanning electron microscopy. The results show that the introducing of BN short fiber into the ZrB2-20%volSiC lead to a serious of change to the mechanical properties of the ceramic. When the content of the BN short fiber is 10vol%, the flexural strength and fracture toughness reach 422.1MPa and 6.15 MPa•m 1/2 respectively. And the mechanism of the increasing toughness was studied.

Sign in / Sign up

Export Citation Format

Share Document