Thermal Properties of Hybrid Al–Cu-Components Produced by Combining Powder Pressing and Semi-solid Forming Strategies

2021 ◽  
pp. 126-131
Author(s):  
Marco Speth ◽  
Mathias Liewald ◽  
Kim Rouven Riedmüller
Keyword(s):  
Thermal Properties ◽  
Powder Pressing ◽  
Semi Solid

scholarly journals Fabrication of Al6061-CNT Composite by Mechanical Alloying Followed by Semi-Solid Powder Processing

2010 ◽  
Author(s):  
Yufeng Wu ◽  
Gap-Yong Kim
Keyword(s):  
Carbon Nanotubes ◽  
Thermal Properties ◽  
Carbon Nanotube ◽  
Mechanical Alloying ◽  
Metal Matrix ◽  
Powder Processing ◽  
Mechanically Alloyed ◽  
The Past ◽  
Reinforcement Material ◽  
Semi Solid

Carbon nanotubes (CNTs) have been widely investigated as a reinforcement material to improve the mechanical, electrical and thermal properties of composite materials. Various routes have been employed to fabricate aluminum-carbon nanotube (Al-CNT) composites in the past few years. However, uniform distribution of CNTs in the metal matrix is still challenging. In this paper, a novel semi-solid powder processing (SPP) was used to incorporate CNT uniformly into the Al6061-CNT composite. Al6061-CNT powders mechanically alloyed for different durations were also examined to understand how the CNTs were dispersed in the Al6061 powders. As-received CNT cluster balls were crushed into dense thin CNT layers during mechanical alloying. As mechanical alloying time increased, CNTs were dispersed in the Al6061 particles. Well-densified microstructures with severely deformed grains were observed in the Al6061-CNT composite.

Study on Mould Heat Penetration Depth for Semi-Solid Net Shape Forming

2010 ◽  
Vol 37-38 ◽  
pp. 1311-1315
Author(s):  
Wen Liu ◽  
Mi Lan Zhang ◽  
Zhi Xin Jia ◽  
Xu Ding
Keyword(s):  
Thermal Properties ◽  
Penetration Depth ◽  
Influence Factors ◽  
Solidification Process ◽  
Mould Material ◽  
Interface Thermal Resistance ◽  
Cubic Curve ◽  
Heat Penetration ◽  
Net Shape Forming ◽  
Semi Solid

The heat penetration depth of mould for Semi-solid net-shape forming affects not only the life of moulds, but also the quality of products. By integral approximate solution of temperature field and analyses of solidification process, a theoretical model of heat penetration depth for semi-solid net-shape forming mould was obtained, and in this model the influence factors such as product material thermal properties, mould material thermal properties and solidification time are given much consideration. Studies show that the heat penetration depth increases exponentially with interface thermal resistance and time respectively, and increase as a cubic curve with pouring temperature and preheating temperature.

Manufacturing of Hybrid Al-Cu-Heatsinks by Combining Powder Pressing with Thixoforming

2022 ◽  
Vol 327 ◽  
pp. 231-237
Author(s):  
Marco Speth ◽  
Mathias Liewald ◽  
Kim Rouven Riedmüller ◽  
Laura Schomer
Keyword(s):  
Aluminium Alloy ◽  
Process Parameters ◽  
Material Properties ◽  
Liquid Fraction ◽  
Heat Sinks ◽  
Functional Requirements ◽  
Transition Zones ◽  
Porous Copper ◽  
Powder Pressing ◽  
Semi Solid

Hybrid material structures allow different material properties to be combined in one single component and thus to meet high functional requirements. When manufacturing such hybrid components, particular attention must be paid to the transition zones between metallic composite partners. These transition zones need to show largely homogeneous and materially bonded structures in order to ensure ideal transmission of the material properties and to prevent component failure due to material defects. In this respect, this paper focuses on a newly developed process in which a powder metallurgical route is combined with semi-solid forming technology. Here, porous copper green bodies are inserted into a forming die and subsequently forged together with a semi-solid aluminium alloy. In this way, it was tried to combine both metal materials into a material locking or at least into a form locking manner in order to achieve ideal material properties in the final hybrid component. The aim of this paper is to find suitable process parameters to infiltrate the porous copper inlay with the semi-solid aluminium alloy during thixoforming. Therefore, different process parameters such as varying liquid fraction of the aluminium alloy and different densities of the green bodies were examined during the production of simply shaped hybrid Al-Cu-components. Afterwards the infiltration depth and produced microstructure of the components was analysed. In the future, this process allows for producing aluminium-copper hybrid heat sinks with improved heat transfer properties compared to conventional produced heat sinks.

The thermal properties of some amine tetraphenylboron salts8-Quinolinol and its derivatives

1960 ◽  
Vol 23 ◽  
pp. 332-336 ◽  
Author(s):  
W WENDLANDT ◽  
J VANTASSEL ◽  
G ROBERTHORTON
Keyword(s):  
Thermal Properties

Thermal properties of an erbium-doped fibre amplifier

1990 ◽  
Vol 137 (3) ◽  
pp. 155 ◽  
Author(s):  
C.A. Millar ◽  
T.J. Whitley ◽  
S.C. Fleming
Keyword(s):  
Thermal Properties ◽  
Fibre Amplifier ◽  
Erbium Doped

Thermal properties of Sr0,3Ba0,7Ti1-yZryO3ferroelectric ceramics: Dependence on sample’s porosity

2005 ◽  
Vol 125 ◽  
pp. 309-311 ◽  
Author(s):  
S. García ◽  
E. Marín ◽  
O. Delgado-Vasallo ◽  
J. Portelles ◽  
G. Peña Rodríguez ◽  
...  
Keyword(s):  
Thermal Properties

THE THERMAL PROPERTIES OF AMORPHOUS ARSENIC AT LOW TEMPERATURES

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-978-C6-979 ◽  
Author(s):  
D. P. Jones ◽  
N. Thomas ◽  
W. A. Phillips
Keyword(s):  
Thermal Properties ◽  
Low Temperatures

Effect of Pavement Material’s Thermal Properties on Thermal Effect of Urban Underlying Surface

CICTP 2020 ◽  
2020 ◽  
Author(s):  
Huan Liu ◽  
Jianzhong Pei ◽  
Jiupeng Zhang ◽  
Xueqian Li
Keyword(s):  
Thermal Properties ◽  
Thermal Effect ◽  
Underlying Surface
Sign in / Sign up

Export Citation Format

Share Document