Ultrahigh thermal conductivity copper/graphite membrane composites prepared by tape casting with hot-pressing sintering

2018 ◽  
Vol 231 ◽  
pp. 60-63 ◽  
Author(s):  
Qianyue Cui ◽  
Chengwei Yu ◽  
Junjie Hao ◽  
Cunguang Chen ◽  
Xiaodong Zhang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Hot Pressing ◽  
Tape Casting ◽  
Hot Pressing Sintering

Mechanical Properties of (Al2O3+Ni) and (Al2O3+Ni)/Ni Laminated Materials

2007 ◽  
Vol 353-358 ◽  
pp. 1447-1450
Author(s):  
Kai Hui Zuo ◽  
Dong Liang Jiang ◽  
Qing Ling Lin ◽  
Yu Ping Zeng ◽  
Zhong Ming Chen
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Grain Size ◽  
Hot Pressing ◽  
Tape Casting ◽  
Crack Deflection ◽  
Second Phase ◽  
Microstructure Refinement ◽  
Hot Pressing Sintering ◽  
Laminated Materials

(Al2O3+Ni) and (Al2O3+Ni)/Ni laminated materials were prepared by tape casting and hot pressing sintering. The mechanical properties of (Al2O3+20wt%Ni) laminated composites were higher than those of (Al2O3+50wt%Ni) composites and Al2O3 sample. The strengthening in the (Al2O3+Ni) composites mainly results from microstructure refinement of the alumina grain size, cracks bridging and crack deflection by the Ni particles. Results showed that the strength and fracture toughness of (Al2O3+Ni)/Ni laminated materials were higher than those of Al2O3/Ni laminated materials with the same layer numbers and thickness ratio. The good mechanical properties of (Al2O3+Ni) and (Al2O3+Ni)/Ni laminated materials result from the second phase of Ni particles in Al2O3 layers.

Preparation and properties of W-SiC/Cu composites by tape casting and hot-pressing sintering

2018 ◽  
Vol 34 (11) ◽  
pp. 1353-1361 ◽  
Author(s):  
Chengcheng Zhang ◽  
Jian Zhang ◽  
Guoqiang Luo ◽  
Yao Liu ◽  
Qiang Shen ◽  
...  
Keyword(s):  
Hot Pressing ◽  
Tape Casting ◽  
Hot Pressing Sintering

scholarly journals Effect of Reinforcements on Mechanical and Thermal Properties of SiC Short-Fibre-Reinforced SiC Composites

2004 ◽  
Vol 13 (4) ◽  
pp. 096369350401300
Author(s):  
Jae-Seol Lee ◽  
Toyohiko Yano
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
High Temperatures ◽  
Hot Pressing ◽  
Fibre Type ◽  
Tape Casting ◽  
Mechanical And Thermal Properties ◽  
Sintering Additives ◽  
Short Fibres ◽  
Sic Composites

Tyranno SA fibre was higher strength at high temperatures and higher thermal conductivity than that of Hi-Nicalon fibre. Therefore, the aim of this study was to investigate the effect of reinforcements on the mechanical and thermal properties of SiC/SiC composites containing non-coated Tyranno SA short fibres. SiC/SiC composites containing 30 vol.% short fibres were fabricated by tape-casting and hot-pressing at 1650°C–1750°C under a pressure of 40 MPa using an Al2O3-Y2O3-CaO mixture as sintering additives independent of fibre type.

Hot Pressing Sintering of ZrB2 with β-SiC Addition

2015 ◽  
Vol 820 ◽  
pp. 262-267
Author(s):  
Mariah Oliveira Juliani ◽  
Rosa Maria Rocha
Keyword(s):  
Thermal Conductivity ◽  
Silicon Carbide ◽  
Phase Transformation ◽  
Melting Point ◽  
Hot Pressing ◽  
Argon Atmosphere ◽  
Unique Property ◽  
High Melting ◽  
High Melting Point ◽  
Hot Pressing Sintering

Zirconium diboride (ZrB2) is a material of particular interest because of the excellent and unique property combination of high melting point, high electrical and thermal conductivity. In this work, the effect of addition of beta-silicon carbide (β-SiC) on hot pressing sintering of ZrB2 was investigated. Four compositions were studied with 0, 10, 20 e 30 vol% of SiC. ZrB2 powder and mixtures were prepared by planetary milling with SiC spheres during 4 h. Samples were sintered at 1850 °C/1h with a pressure of 20 MPa in argon atmosphere. β-SiC has undergone phase transformation to α-SiC during sintering. The addition of SiC increased densification with increasing of SiC content. The total densification of sample was 96.8 % of theoretical density for sample with 30 vol% of SiC and Vickers hardness was 19.9 ± 0.3 GPa.

scholarly journals High Thermal Conductivity and Anisotropy Values of Aligned Graphite Flakes/Copper Foil Composites

Materials ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 46
Author(s):  
Fankun Zeng ◽  
Chen Xue ◽  
Hongbing Ma ◽  
Cheng-Te Lin ◽  
Jinhong Yu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Hot Pressing ◽  
Copper Foil ◽  
Volume Fraction ◽  
Layer Structure ◽  
Tape Casting ◽  
Casting Machine ◽  
Interfacial Thermal Resistance ◽  
Layer By Layer ◽  
Sem Images

Much attention has been paid to graphite flakes/copper (GFs/Cu) composites for thermal management due to their remarkable thermal properties. Most studies focus on the interface interaction between GFs and Cu in composites. However, controlling the orientation of GFs still remains a challenge. Herein, we report a reliable method to ensure consistent orientation of GFs in the composites. Firstly, the disorder GFs were well arranged on the surface of copper foil by tape casting process in the casting machine. Then highly aligned GFs/Cu composites were fabricated by hot pressing process in a vacuum hot-pressing furnace, with the volume fraction of graphite from 30% to 70%. The SEM images show that the obtained GFs/Cu composites presented a layer-by-layer structure or network structure with a different content of GFs. The thermal conductivity of GFs/Cu composites exhibited an extreme anisotropy due to the highly aligned GFs. The ultrahigh thermal conductivity of GFs/Cu composites with 70 vol% GFs reached 741 W/(m·K), while through-plane thermal conductivity was just 42 W/(m·K). The alignment of GFs and interfacial thermal resistance were deeply analyzed and a thermal conductivity model for GFs/Cu composites was established. Our work provides a new idea to significantly enhance the thermal transportation performance of GFs/Cu composites by well controlled alignment of GFs in Cu matrix.

Fabrication of Silicon Nitride Ceramics with Magnesium Silicon Nitride and Yttrium Oxide as Sintering Additives

2010 ◽  
Vol 177 ◽  
pp. 235-237 ◽  
Author(s):  
Guo Jian Jiang ◽  
Jia Yue Xu ◽  
Hui Shen ◽  
Yan Zhang ◽  
Gui Hua Peng ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Silicon Nitride ◽  
Hot Pressing ◽  
Uniaxial Pressure ◽  
Bend Strength ◽  
Si3n4 Ceramic ◽  
Sintering Additive ◽  
Sintering Properties ◽  
Hot Pressing Sintering ◽  
Si3n4 Ceramics

Si3N4 ceramics have been fabricated through pressureless sintering and hot-pressing sintering with MgSiN2-Y2O3 or only MgSiN2 as sintering additive, respectively. The effects of MgSiN2 and Y2O3 and sintering methods on sintering properties of Si3N4 ceramics were studied. The results indicate that the bend strength of Si3N4 ceramic with 5.6wt.%MgSiN2-15.8wt.%Y2O3 sintered at 1820°C for 4h could achieve 839MPa. The bend strength of Si3N4 ceramic with 4.76wt.%MgSiN2 produced by hot-pressing sintering at 1750°C for 1h under uniaxial pressure of 20MPa is 1149MPa. The thermal conductivity of the Si3N4 ceramic was 92Wm-1K-1 and could remarkably increase to 129Wm-1K-1 by prolonging the sintering time from 1 h to 12 h. The present work demonstrated that MgSiN2 additives and hot-pressing sintering were effective to improve the thermal conductivity of Si3N4 ceramic.

Effect of TiB2 on Pressureless Sintering and Hot Pressing of ZrB2

2016 ◽  
Vol 881 ◽  
pp. 97-102 ◽  
Author(s):  
Carolyne Oliveira Davi ◽  
Miriam K.H. Yassuda ◽  
Rosa Maria Rocha
Keyword(s):  
Thermal Conductivity ◽  
Solid Solution ◽  
Hot Pressing ◽  
Planetary Mill ◽  
Unique Property ◽  
Pressureless Sintering ◽  
High Melting ◽  
Sintering Process ◽  
High Melting Point ◽  
Hot Pressing Sintering

Zirconium diboride (ZrB2) is a material of particular interest because of the excellent and unique property combination of high melting point and high electrical and thermal conductivity. In this work, the effect of TiB2 addition on pressureless sintering and hot pressing sintering of ZrB2 was investigated. Four compositions were prepared with 0, 5, 10 and 20 wt% of TiB2. First, ZrB2 and TiB2 powders were milled by planetary mill with SiC spheres at for 4 h and then they were wet mixed. Compacted samples were pressureless sintered at 2150 oC/1h and hot pressed at 1850 °C/30min with 20 MPa, both in Ar atmosphere. The added TiB2 completely dissolved into the structure and formed a solid solution with ZrB2. Addition of TiB2 in ZrB2 ceramic improved densification and hardness for both sintering process, but hot pressed samples exhibited better results.

Sign in / Sign up

Export Citation Format

Share Document