scholarly journals In-situ processing of TiB2 nanoparticle-reinforced copper matrix composites

2009 ◽  
Vol 41 (2) ◽  
pp. 143-150 ◽  
Author(s):  
D. Bozic ◽  
I. Cvijovic-Alagic ◽  
B. Dimcic ◽  
J. Stasic ◽  
V. Rajkovic
Keyword(s):  
Composite Powder ◽  
Hot Isostatic Pressing ◽  
Copper Matrix ◽  
Dispersed Phase ◽  
Matrix Composites ◽  
Small Particles ◽  
Standard Powder ◽  
In Situ Processing ◽  
Tib2 Particles

In order to produce the composite powder analyzed in this paper, two prealloys were melted and afterwards gas atomized. The obtained TiB2-reinforced copper powder was consolidated by hot isostatic pressing (HIP). Since it is known that a decrease in the size of the reinforcing phase can cause an increase in hardness of composites, the main aim of the experimental work was to obtain as small particles of the dispersed phase as possible by using standard powder metallurgy techniques. Microstructure and microhardness of the ascast prealloys, as-atomized powder and HIP-ed compacts were examined. The results of these examinations revealed that TiB2 particles about 10 nm in size were in-situ formed and homogenously dispersed in the copper matrix. As a consequence of the TiB2 formation, the microhardness of Cu-TiB2 composite was significantly improved.

Preparation and properties of TiB2 nanoparticle reinforced copper matrix composites by in situ processing

2002 ◽  
Vol 52 (6) ◽  
pp. 448-452 ◽  
Author(s):  
J.P Tu ◽  
N.Y Wang ◽  
Y.Z Yang ◽  
W.X Qi ◽  
F Liu ◽  
...  
Keyword(s):  
Copper Matrix ◽  
Matrix Composites ◽  
Copper Matrix Composites ◽  
In Situ Processing

Mechanical Behavior of TiB2 Nanoparticles Reinforced Cu Matrix Composites Synthesized by In-Situ Processing

2006 ◽  
Vol 510-511 ◽  
pp. 346-349 ◽  
Author(s):  
Dae Hwan Kwon ◽  
Khoa Xuan Huynh ◽  
Thuy Dang Nguyen ◽  
Pyuck Pa Choi ◽  
Myung-Gyu Chang ◽  
...  
Keyword(s):  
Copper Matrix ◽  
High Energy ◽  
Matrix Composites ◽  
Mechanical And Electrical Properties ◽  
Plasma Sintering ◽  
High Temperature Synthesis ◽  
Spark Plasma ◽  
Nanocomposite Powders ◽  
Tib2 Particles

Cu-TiB2 nanocomposite powders were in situ synthesized by combining high-energy ball milling of Cu-Ti-B elemental powder mixtures as precursors and subsequent self-propagating high temperature synthesis (SHS). Cu-40wt.% TiB2 was produced after SHS reaction and then diluted by copper to obtain desired homogeneous composites with 2.5, 5 and 10wt.%TiB2. Spark plasma sintering (SPS) was used to inhibit grain growth and thereby obtain fully Cu-TiB2 sintered bodies with nanocomposite structure. After SHS reaction, only Cu and TiB2 phases were detected in the SHS-product. Spheroidal TiB2 particles smaller than 250nm were formed in the copper matrix after SHS-reaction. Mechanical and electrical properties were investigated after SPS at 650°C for 30min under 50MPa. The electrical conductivity decreased from 75 to 54% IACS with increasing of TiB2 contents from 2.5 to 10wt.%. However, hardness increased from 56 to 97HRB. In addition, the tensile strength increased with increasing the TiB2 content.

scholarly journals Arc erosion resistance of hybrid copper matrix composites reinforced with CNTs and micro-TiB2 particles

2021 ◽  
Vol 11 ◽  
pp. 1469-1479 ◽  
Author(s):  
Xiuhua Guo ◽  
Yubo Yang ◽  
Kexing Song ◽  
Li Shaolin ◽  
Feng Jiang ◽  
...  
Keyword(s):  
Erosion Resistance ◽  
Copper Matrix ◽  
Matrix Composites ◽  
Copper Matrix Composites ◽  
Arc Erosion ◽  
Tib2 Particles

Mechanical Behavior of TiB2 Nanoparticles Reinforced Cu Matrix Composites Synthesized by In-Situ Processing

2006 ◽  
pp. 346-349
Author(s):  
Dae Hwan Kwon ◽  
Khoa Xuan Huynh ◽  
Thuy Dang Nguyen ◽  
Pyuck Pa Choi ◽  
Myung-Gyu Chang ◽  
...  
Keyword(s):  
Mechanical Behavior ◽  
Matrix Composites ◽  
In Situ Processing

scholarly journals Trace Scandium addition on the strength and thermal stability of TiB2 particles reinforced Al-4.5 Cu composites

2021 ◽  
Vol 2133 (1) ◽  
pp. 012018
Author(s):  
Yunliang Zhang ◽  
Wentao Yu ◽  
Xinliang Wang ◽  
Yanqing Xue
Keyword(s):  
Mechanical Properties ◽  
Room Temperature ◽  
Fracture Strain ◽  
Copper Matrix ◽  
Homogeneous Distribution ◽  
Matrix Composites ◽  
Aluminium Copper ◽  
Sc Addition ◽  
Tib2 Particles ◽  
Thermal Stability Of

Abstract Strategies employed for developing ultrahigh strength and scalable ductile particles reinforced aluminium-copper matrix composites (AMCs) are highly desirable and grandly challenging. In the present paper, the Scandium (Sc) micro-alloying TiB2 particles reinforced Al-4.5 Cu composites were successfully fabricated by the optimized salt-metal reaction method. The observed microstructures displayed that Sc addition could remarkably ameliorate the dispersion of TiB2 particles, enlarge equiaxed α-Al grain zone and refine the grains on the basis of TiB2 heterogeneous nucleation. In particular, for the 0.4 wt.% Sc microalloyed 5%TiB2/Al-4.5Cu composites, more than a 20 %, 87 %, and 118 % increase in the ultimate tensile strength (UTS), fracture strain elongation (%) and microhardness (HV), respectively were found with respect to the 3 %TiB2/Al-4.5Cu composites at room temperature (298K). The improved mechanical properties of strength-ductility synergy were mainly thanks to the homogeneous distribution of TiB2 particles and modification of Al2Cu phase. Moreover, proper Sc also enhanced the elevated-temperature mechanical properties of the composites with the aid of the accelerated precipitation of θ′ phase and much lower coarsens rate.

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