Mold Design for Improving the Microbubble of Fine Liquid Silicon Products

2021 ◽  
Vol 30 (2) ◽  
pp. 111-118
Author(s):  
Seon-Hee Dong ◽  
Deuk-soo Son ◽  
Woo-Young Lee
Keyword(s):  
Liquid Silicon ◽  
Mold Design

AEM of reaction-bonded SiC

1992 ◽  
Vol 50 (1) ◽  
pp. 344-345
Author(s):  
K Das Chowdhury ◽  
R. W. Carpenter ◽  
W. Braue
Keyword(s):  
Mechanical Properties ◽  
Phase Transformation ◽  
High Temperature ◽  
Epitaxial Growth ◽  
Liquid Silicon ◽  
Structural Ceramic ◽  
Few Data

Research on reaction-bonded SiC (RBSiC) is aimed at developing a reliable structural ceramic with improved mechanical properties. The starting materials for RBSiC were Si,C and α-SiC powder. The formation of the complex microstructure of RBSiC involves (i) solution of carbon in liquid silicon, (ii) nucleation and epitaxial growth of secondary β-SiC on the original α-SiC grains followed by (iii) β>α-SiC phase transformation of newly formed SiC. Due to their coherent nature, epitaxial SiC/SiC interfaces are considered to be segregation-free and “strong” with respect to their effect on the mechanical properties of RBSiC. But the “weak” Si/SiC interface limits its use in high temperature situations. However, few data exist on the structure and chemistry of these interfaces. Microanalytical results obtained by parallel EELS and HREM imaging are reported here.

A Development of Virtual Manufacturing System for Magnesium High Pressure Die Casting Processes

Materials ◽  
2003 ◽  
Author(s):  
Weilong Chen
Keyword(s):  
High Pressure ◽  
Magnesium Alloys ◽  
Die Casting ◽  
Virtual Manufacturing ◽  
Mold Design ◽  
High Pressure Die Casting ◽  
Molten Magnesium ◽  
Pressure Die Casting ◽  
Soft And Hardware ◽  
Free Magnesium

In recent years, high-pressure die-casting magnesium components have been gaining currency worldwide because of the excellent properties that magnesium alloys can offer to meet new product requirements. With the increasing application of magnesium parts worldwide, many research and development projects have been carried out to advance HPDC technology. However, truly optimized mold design and production of defect free castings remains a challenge for die casters. For many HPDC magnesium products, especially those specified for porosity-free and high cosmetic requirement, the challenge not only comes form a lack of a deeper understanding of how molten magnesium alloys fill the mold cavity and form defects, but also from improper preliminary part design. This study proposes a virtual prototyping system that integrates several effective soft and hardware tools for both the part and mold-design engineer to evaluate part manufacturability. Also, investigated in this study are the major causes of those defects that are the predominant cause of rejection of thin walled, leak-free magnesium parts requiring highly cosmetic finishes.

The Interactions of Carbon and Nitrogen in Liquid Silicon

2014 ◽  
Vol 33 (4) ◽  
pp. 363-368 ◽  
Author(s):  
Halvor Dalaker ◽  
Merete Tangstad
Keyword(s):  
Silicon Nitride ◽  
Carbon Source ◽  
Nitrogen Content ◽  
High Purity ◽  
Liquid Silicon ◽  
Interaction Parameters ◽  
Carbon And Nitrogen ◽  
Temperature Range ◽  
High Purity Silicon

AbstractThe interactions between carbon and nitrogen in liquid silicon have been studied experimentally. High purity silicon was melted in silicon nitride crucibles under an Ar atmosphere with a graphite slab inserted in the crucible prior to melting as a carbon source. The system was thus simultaneously equilibrated with Si3N4 and SiC. Samples were extracted in the temperature range 1695–1798 K and analyzed using Leco.It was observed that the simultaneous saturation of nitrogen and carbon caused a significant increase in the solubilities of both elements. The interaction parameters were derived as The solubility of carbon in liquid silicon as a function of temperature and nitrogen content was found to follow: And the solubility of nitrogen in liquid silicon found to follow:

Liquid Silicon-Monona

2018 ◽  
Vol 53 (2) ◽  
pp. 214-228 ◽  
Author(s):  
Yue Zha ◽  
Jing Li
Keyword(s):  
Liquid Silicon

scholarly journals Persistence of Covalent Bonding in Liquid Silicon Probed by Inelastic X-Ray Scattering

2012 ◽  
Vol 108 (6) ◽  
Author(s):  
J. T. Okada ◽  
P. H.-L. Sit ◽  
Y. Watanabe ◽  
Y. J. Wang ◽  
B. Barbiellini ◽  
...  
Keyword(s):  
Covalent Bonding ◽  
Liquid Silicon ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

The Optical Fiber Connector Ceramic Insert Core Injection Mold Design

2014 ◽  
Vol 624 ◽  
pp. 712-714
Author(s):  
Pei Yun Ao
Keyword(s):  
Optical Fiber ◽  
Structural Characteristics ◽  
Flow Characteristics ◽  
Powder Injection ◽  
Mold Design ◽  
Injection Mold ◽  
Additive Formulation ◽  
Injection Mold Design ◽  
Optical Fiber Connector ◽  
Ceramic Insert

According to the structural characteristics of optical fiber connector Ceramic insert core, this article analyzed the structure technology of it. Based on Mold wizard module and Pro/Moldsign module. We conducted injection mold design of optical fiber connector ceramic insert core; Put forward the flow characteristics of zirconia powder injection feeding and binder, lubricants and other additive formulation.

Electrical Conductivity of SiC/Si Composites Obtained from Wood Preforms

2011 ◽  
Vol 66 (1-2) ◽  
pp. 134-138
Author(s):  
Marco Antonio Béjar ◽  
Rodrigo Mena ◽  
Juan Esteban Toro
Keyword(s):  
Electrical Conductivity ◽  
Silicon Content ◽  
Beech Wood ◽  
Liquid Silicon

Biomorphic SiC/Si composites were produced from pine and beech wood, and the corresponding electrical conductivity was determined as a function of the temperature. Firstly, wood preforms were pyrolized at 1050 °C in nitrogen. Then, the pyrolized preforms were impregnated with liquid silicon and kept at 1600 °C for 2 h in vacuum. The SiC/Si composites were obtained due to the produced carbothermal reaction. As expected, the resulting electrical conductivity of these composites increased with the temperature and with the silicon content.

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