High-temperature properties of extruded titanium composites fabricated from carbon nanotubes coated titanium powder by spark plasma sintering and hot extrusion
スポンサーリンク
概要
- 論文の詳細を見る
Pure titanium matrix composite reinforced with carbon nanotubes (CNTs) was prepared by spark plasma sintering and hot extrusion via powder metallurgy process. Titanium (Ti) powders were coated with CNTs via a wet process using a zwitterionic surfactant solution containing 1.0, 2.0 and 3.0 wt.% of CNTs. In situ TiC formation via reaction of CNTs with titanium occurred during sintering, and TiC particles were uniformly dispersed in the matrix. As-extruded Ti/TiCs composite rods were annealed at 473 K for 3.6 ks to reduce the residual stress during processing. After annealing process, the tensile properties of the composites were evaluated at room temperature, 473, 573 and 673 K, respectively. Hardness test was also performed at room temperature up to 573 K with a step of 50 K. The mechanical properties of extruded Ti/CNTs composites at elevated temperature were remarkably improved by adding a small amount of CNTs, compared to extruded Ti matrix. These were due to the TiC dispersoids originated from CNTs effectively stabilized the microstructure of extruded Ti composites by their pinning effect. Moreover, the coarsening and growth of Ti grain never occurred even though they were annealed at 573, 673 K for 36 ks and 673 K for 360 ks, respectively.
- 2012-06-28
著者
-
Umeda Junko
Joining And Welding Res. Inst. Osaka Univ.
-
Kondoh Katsuyoshi
Joining And Welding Of Research Institute Osaka University
-
Threrujirapapong Thotsaphon
Graduate School Of Engineering Osaka University
-
Umeda Junko
Joining And Welding Research Institute
関連論文
- Characteristics of powder metallurgy pure titanium matrix composite reinforced with multi-wall carbon nanotubes
- Development of Lead-Free Machinable Brass with Bismuth and Graphite Particles by Powder Metallurgy Process
- Aluminum-4 mass% Copper/Alumina Composites Produced from Aluminum Copper and Rice Husk Ash Silica Powders by Powder Forging
- Mechanical Properties of a Titanium Matrix Composite Reinforced with Low Cost Carbon Black via Powder Metallurgy Processing
- Effect of chromium precipitation on machinability of sintered brass alloys dispersed with graphite particles
- Cost Effective Pure Titanium with High Mechanical Response by Oxide Dispersion Strengthening
- In-Situ Synthesis of Ti Matrix Composite Reinforced with Dispersed Ti_5Si_3 Particles via Spark Plasma Sintering
- Process Parameters Optimization in Preparing High-Purity Amorphous Silica Originated from Rice Husks
- PM2010 Powder Metallurgy World Congress & Exhibition
- Effect of Chromium Precipitation on Machinability of Sintered Brass Alloys Dispersed with Graphite Particles
- EFFECT OF MATERIAL FLOW BY DOUBLE-SIDED FSW ON MECHANICAL PROPERTIES OF MG ALLOYS
- High-temperature properties of extruded titanium composites fabricated from carbon nanotubes coated titanium powder by spark plasma sintering and hot extrusion
- Microstructure evolution and mechanical properties of double-sided friction stir welded AZ31B Mg alloy
- Fabrication of Al-Fe Alloys by Repeated Compaction and Extrusion of Mixture of Elemental Powders