Preparation and Properties of Cf-TiB2-Cu-Graphite Composites

2012 ◽  
Vol 535-537 ◽  
pp. 8-13
Author(s):  
Shao Fan Xu ◽  
Shao Ping Xu ◽  
Cheng Nan Zhu ◽  
Chuan Yong Yuan
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Powder Metallurgy ◽  
Dry Friction ◽  
Bending Strength ◽  
Physical And Mechanical Properties ◽  
Powder Metallurgy Method ◽  
Sliding Velocity ◽  
Graphite Composite ◽  
Graphite Composites

Copper-plated TiB2-Cu-graphite composite, Cf-TiB2-Cu-graphite composite and Cf-copper-plated TiB2-Cu-graphite composite with the same TiB2 content were prepared by the powder metallurgy method. Physical and mechanical properties of these composites were tested. The dry friction tests of the composites under sliding velocity of 10m/s and load of 4.9N were conducted for 36h. The results show that the properties of the Cf-copper-plated TiB2-Cu-graphite composite such as electric conductivity, hardness, bending strength and wear resistance are increased remarkably than those of either Cf-TiB2-Cu-graphite or copper-plated TiB2-Cu-graphite composites.

Preparation and Properties of Cf-Ti3SiC2-Cu-Graphite Composites

2013 ◽  
Vol 457-458 ◽  
pp. 206-210
Author(s):  
Shao Fan Xu ◽  
Shao Ping Xu ◽  
Cheng Nan Zhu ◽  
Qing Bi Zhao
Keyword(s):  
Carbon Fiber ◽  
Dry Friction ◽  
Bending Strength ◽  
Physical And Mechanical Properties ◽  
Powder Metallurgy Method ◽  
Sliding Velocity ◽  
Graphite Composite ◽  
Short Carbon Fiber ◽  
Graphite Composites ◽  
Short Carbon

Copper-plated short carbon fiber/copper-plated Ti3SiC2-Cu-graphite composite, copper-plated short carbon fiber/Ti3SiC2-Cu-graphite composite with the same carbon fiber content and copper-plated Ti3SiC2-Cu-graphite composite were prepared by the powder metallurgy method. Physical and mechanical properties of these composites were tested. The dry friction tests of the composites under sliding velocity of 10m/s and load of 4.9N were conducted for 36 hours. The results show that the properties of the Cf-copper-plated Ti3SiC2-Cu-graphite composite such as electric conductivity, bending strength and wear resistance are remarkably increased than those of either Cf-Ti3SiC2-Cu-graphite or copper-plated Ti3SiC2-Cu-graphite composites.

Sintered High Carbon Steels: Effect of Thermomechanical Treatments on their Mechanical and Wear Performance

2008 ◽  
Vol 591-593 ◽  
pp. 271-276 ◽  
Author(s):  
M.A. Martinez ◽  
R. Calabrés ◽  
J. Abenojar ◽  
Francisco Velasco
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Powder Metallurgy ◽  
Thermomechanical Treatment ◽  
Bending Strength ◽  
Carbon Steels ◽  
Tool Steels ◽  
High Carbon ◽  
Wear Performance ◽  
Metallographic Study

In this work, ultrahigh carbon steels (UHCS) obtained by powder metallurgy with CIP and argon sintered at 1150°C. Then, they were rolled at 850 °C with a reduction of 40 %. Finally, steels were quenched at 850 and 1000 °C in oil. In each step, hardness, bending strength and wear performance were evaluated. Obtained results are justified with a metallographic study by SEM. Both mechanical properties and wear resistance are highly favoured with the thermomechanical treatment that removes the porosity of the material. Moreover, final quenching highly hardens the material. The obtained material could be used as matrix for tool steels.

Improvement in physical and mechanical properties of aluminum/zircon composites fabricated by powder metallurgy method

2011 ◽  
Vol 32 (8-9) ◽  
pp. 4417-4423 ◽  
Author(s):  
Hossein Abdizadeh ◽  
Maziar Ashuri ◽  
Pooyan Tavakoli Moghadam ◽  
Arshia Nouribahadory ◽  
Hamid Reza Baharvandi
Keyword(s):  
Mechanical Properties ◽  
Powder Metallurgy ◽  
Physical And Mechanical Properties ◽  
Powder Metallurgy Method

Fabrication and Mechanical Properties of Alumina—CNTs Composites

2011 ◽  
Vol 66-68 ◽  
pp. 1390-1396
Author(s):  
Jing Song Zhao ◽  
Yi Feng ◽  
Nan Nan Chen ◽  
Fan Yan Chen ◽  
Jie Chen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Powder Metallurgy ◽  
Nuclear Waste ◽  
Mass Fraction ◽  
Bending Strength ◽  
Waste Material ◽  
Powder Metallurgy Method ◽  
The Matrix

The transmutation target of nuclear waste material has been fabrication by a powder metallurgy method by using Alumina as the matrix and CNTs as reinforcement. The effect of different nanotube contents on the fracture toughness and the bending strength was investigation. The results showed the fracture toughness and the bending strength of composites increased with increasing CNTs mass fraction when the content of CNTs was less than 1.5%. However, when the contents of CNTs greater than 1.5%, the fracture toughness and the bending strength of composites decreased as the content of CNTs increased. Possible mechanisms are discussed in detail in the paper.

The effect of nanoparticle content on the microstructure and mechanical properties of ZA27-Al2O3-Gr hybrid nanocomposites produced by powder metallurgy

2021 ◽  
pp. 002199832110157
Author(s):  
Müslim Çelebi ◽  
Onur Güler ◽  
Aykut Çanakçı ◽  
Hamdullah Çuvalcı
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Powder Metallurgy ◽  
Physical And Mechanical Properties ◽  
Primary Objective ◽  
Hybrid Nanocomposites ◽  
Powder Metallurgy Method ◽  
Microstructure Examination ◽  
Density Values ◽  
Different Content

In this study, ZA27-Al2O3-Gr hybrid nanocomposite materials (HNMs) were prepared by powder metallurgy method including mechanical-milling and hot-pressing (HP). The physical and mechanical properties of ZA27-Al2O3-Gr HNMs have been investigated with the primary objective of understanding the influence of the alumina (Al2O3) nanoparticle (n-Al2O3) reinforcement. The density, hardness and tensile strength tests of HNMs carried out to determine the physical and mechanical properties of ZA27-Al2O3-Gr HNMs. Scanning Electron Microscope (SEM) is used for the microstructural evolution of the HNMs. As a result of microstructure examination results, n-Al2O3 were observed around grain boundary while the graphite (Gr) nanoparticles (n-Gr) were dispersed homogeneous throughout ZA27 matrix. Relative density values decreased with the increase of nanoparticle reinforcement ratio from 1%vol to 4%vol., while an increase in porosity values was detected for HNMs. Moreover, the results showed that the addition of n-Al2O3 significantly improved the mechanical properties of the HNMs. Additionally, the HNMs reinforced with 4%vol. n-Al2O3 and 1%vol. n-Gr exhibited the highest tensile strength of about 158 MPa and hardness of 160 HB in comparison with the other HNMs reinforced with different content of n-Al2O3.

Study of the System Mo-Fe-B for Wear-Resistant Materials

2008 ◽  
Vol 591-593 ◽  
pp. 265-270
Author(s):  
J. Abenojar ◽  
M.A. Martinez ◽  
Francisco Velasco
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Bending Strength ◽  
Sintering Temperature ◽  
Physical And Mechanical Properties ◽  
Dimensional Change ◽  
High Wear Resistance ◽  
Mechanically Alloyed ◽  
Metal Borides ◽  
Ternary Boride

Borides, especially transition metal borides, like Mo2FeB2 ternary boride, are promising candidates for wear resistance applications. However, poor sinterability and extreme brittleness raise difficulties to manufacture a structural material. In this work, the viability to obtain Fe-Mo-B alloys with high wear resistance materials obtained by PM techniques is studied. Other researchers use Cr and Ni alloyed steels and the B amount addition is very low. The main objectives are to increase the amount of B, not to use Cr alloyed steels and to decrease the sintering temperature. This can be obtained using mechanically alloyed Fe/B (50% by wt.) powders, which are highly reactive after milling for 36 h. The mixture has a composition of 40%Mo-40%Fe-20%Fe/B, being characterized by flow rate and apparent density. These materials were uniaxially compacted and vacuum sintered. Specimens were analysed by SEM and physical and mechanical properties were evaluated (density, dimensional change, bending strength, hardness and wear).

Effect of Molybdenum on the Microstructure and Mechanical Properties of TiC-Fe Cermets

2012 ◽  
Vol 557-559 ◽  
pp. 205-208 ◽  
Author(s):  
Hai Yang Dai ◽  
Jun Feng Li ◽  
Feng Xiao Zhai ◽  
Xue Rui Cheng ◽  
Yu Bo Wang
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Wear Resistance ◽  
Powder Metallurgy ◽  
Impact Toughness ◽  
Carbide Phase ◽  
Bending Strength ◽  
Microstructure And Mechanical Properties ◽  
Mo Content

The influence of Mo addition on the microstructure and mechanical properties of the TiC-Fe cermets has been studied. The specimens with different contents of Mo (4-8 wt.%) added into the TiC-Fe cermets were fabricated by conventional powder metallurgy and vacuum sintered at temperatures of 1440 °C. The microstructure and mechanical properties such as bending strength, impact toughness, hardness, wear resistance were investigated. The micrographs with different Mo content show that the final grain size of carbide phase became smaller and the specimens became more homogeneous and compact with increasing Mo content from 4 wt.% to 8 wt.% in raw powders. The mechanical properties measured show that the bending strength, impact toughness and wear resistance are the best when the Mo content is 6 wt.%.

Study on the Preparation of Flexible Graphite Composites

2013 ◽  
Vol 405-408 ◽  
pp. 2947-2952
Author(s):  
Xue Mei Lin ◽  
Bin Zhang ◽  
Hao Ran Deng
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Carbon Fiber ◽  
Bending Strength ◽  
Basic Material ◽  
Graphite Composite ◽  
Forming Temperature ◽  
Temperature And Pressure ◽  
Flexible Graphite ◽  
Graphite Composites

Flexible Graphite Composite (FGC) was prepared using flexible graphite as the basic material. The influence of the contents of binder and carbon fiber, and forming temperature and pressure was discussed on the mechanical properties. The experimental results showed that the optimum technologic conditions are binder A content 3%~10%, carbon fiber 0.5% ~1%, forming temperature 500°C~900°C, forming pressure 18MPa~25MPa. The density, tensile strength, compressive strength, and bending strength are optimal under these conditions.

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