Preparation of Low Cost Ti-6Al-4V Alloy by Gelcasting

2012 ◽  
Vol 468-471 ◽  
pp. 2078-2081
Author(s):  
Qing Ye ◽  
Jun Jie Hao ◽  
Zhi Meng Guo ◽  
Min Chao Ru
Keyword(s):  
Relative Density ◽  
High Performance ◽  
Bending Strength ◽  
Low Cost ◽  
Morphological Properties ◽  
Green Body ◽  
High Solids ◽  
Rotating Electrode ◽  
Solids Loading ◽  
High Solids Loading

Ti-6Al-4V alloy was prepared by gelcasting. Plasma rotating electrode and hydrogenation-dehydrogenation Ti-6Al-4V powders were mixed used to meet both high performance and low cost objectives. The morphological properties were investigated by SEM. The results showed that the gelcasting green body with mixed powders has advantages of high solids loading and excellent sinterability. After sintered at 1400°C for 2h, the relative density reached 98%. The bending strength and hardness were 313MPa and 49.8(HRC).

Effects of Gelcasting Parameters on the Solids Loading of Ti-6Al-4V

2012 ◽  
Vol 468-471 ◽  
pp. 1649-1652
Author(s):  
Qing Ye ◽  
Jun Jie Hao ◽  
Zhi Meng Guo ◽  
Min Chao Ru
Keyword(s):  
Morphological Properties ◽  
Ammonium Citrate ◽  
Green Body ◽  
High Solids ◽  
Critical Factors ◽  
Optimum Conditions ◽  
Powder Morphology ◽  
Factors Affecting ◽  
Solids Loading ◽  
High Solids Loading

Ti-6Al-4V green body was processed by gelcasting. Effects of the powder morphology, dispersant and pH on the solids loading were investigated. The morphological properties were investigated by SEM. The results show that the powder morphology is the overriding factor in slurry processing. Slection of dispersant and pH are another two critical factors affecting the solids loading by a percentage of 2 to 4. With optimum conditions: spherical powders, 1.5 wt.% ammonium citrate as the dispersant and pH=11, the green body with high solids loading of 59.4% was prepared.

Toward high solids loading process for lignocellulosic biofuel production at a low cost

2017 ◽  
Vol 114 (5) ◽  
pp. 980-989 ◽  
Author(s):  
Mingjie Jin ◽  
Cory Sarks ◽  
Bryan D. Bals ◽  
Nick Posawatz ◽  
Christa Gunawan ◽  
...  
Keyword(s):  
Low Cost ◽  
Biofuel Production ◽  
High Solids ◽  
Loading Process ◽  
Solids Loading ◽  
High Solids Loading ◽  
Lignocellulosic Biofuel

Gelcasting of BeO

2012 ◽  
Vol 184-185 ◽  
pp. 992-1000
Author(s):  
Wei Shi
Keyword(s):  
Thermal Conductivity ◽  
Green Body ◽  
High Solids ◽  
Homogeneous Microstructure ◽  
Ph Values ◽  
Solids Loading ◽  
Gel Casting ◽  
High Solids Loading ◽  
Aqueous Solvent ◽  
Suitable Process

Aqueous gel-casting of beryllia using polyelectrolyte NH4PAA as a dispersant has been investigated. The effects of the dispersant amount, pH values on the surface properties of BeO powders in aqueous solvent were studied and high solids loading BeO suspension (45 vol.%) was developed. A premix solution containing 15-20 wt.% of AM monomer can provide enough mechanical strength for the green body obtained from 45 vol.% BeO suspension. SEM photography indicates that BeO ceramics with homogeneous microstructure can be fabricated. The thermal conductivity of sintered green body is 182.1±10 W/(m.K). Gelcasting is a suitable process to form BeO ceramic parts.

One-pot ethanol production under optimized pretreatment conditions using agave bagasse at high solids loading with low-cost biocompatible protic ionic liquid

2021 ◽  
Author(s):  
Jose A. Perez-Pimienta ◽  
Gabriella Papa ◽  
Jian Sun ◽  
Vitalie Stavila ◽  
Arturo Sanchez ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Low Cost ◽  
Biomass Productivity ◽  
High Solids ◽  
Bioenergy Feedstock ◽  
Protic Ionic Liquid ◽  
One Pot ◽  
Solids Loading ◽  
High Solids Loading ◽  
Pretreatment Conditions

Agave bagasse (AG) is used as potential bioenergy feedstock due to its high biomass productivity, even in semiarid lands. In particular, Ionic liquid (IL) pretreatment using aprotic ILs (AILs) has...

The effect of high solids loading in ethanol production integrated with a pulp mill

2016 ◽  
Vol 111 ◽  
pp. 387-402 ◽  
Author(s):  
Elin Svensson ◽  
Valeria Lundberg ◽  
Mikael Jansson ◽  
Charilaos Xiros ◽  
Thore Berntsson
Keyword(s):  
Ethanol Production ◽  
Pulp Mill ◽  
High Solids ◽  
Solids Loading ◽  
High Solids Loading

scholarly journals Enhanced Performance of Fly Ash-Based Supports for Low-Cost Ceramic Membranes with the Addition of Bauxite

Membranes ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 711
Author(s):  
Wan Fan ◽  
Dong Zou ◽  
Jingrui Xu ◽  
Xianfu Chen ◽  
Minghui Qiu ◽  
...  
Keyword(s):  
Fly Ash ◽  
High Performance ◽  
Bending Strength ◽  
Ceramic Membrane ◽  
Sintering Temperature ◽  
Low Cost ◽  
Pure Water ◽  
Ceramic Membranes ◽  
Mullite Phase ◽  
Optimum Balance

Support is a necessary foundation for ceramic membranes to achieve high performance. Finding the optimum balance between high performance and low cost is still a significant challenge in the fabrication of ceramic supports. In this study, low-cost fly ash-based ceramic supports with enhanced performance were prepared by the addition of bauxite. The pore structure, mechanical strength, and shrinkage of fly ash/bauxite supports could be tuned by optimizing the bauxite content and sintering temperature. When the sintering temperature and bauxite content were controlled at 1300 °C and 40 wt%, respectively, the obtained membrane supports exhibited a high pure water permeance of approximately 5.36 m3·m−2·h−1·bar−1 and a high bending strength of approximately 69.6 MPa. At the same time, the optimized ceramic supports presented a typical mullite phase and excellent resistance to acid and alkali. This work provides a potential route for the preparation of ceramic membrane supports with characteristics of low cost and high performance.

scholarly journals Rapid Fabrication of High-Performance CaO-Based Integral Ceramic Mould by Stereolithography and Non-Aqueous Gelcasting

Materials ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 934 ◽  
Author(s):  
Qiang Yang ◽  
Weijun Zhu ◽  
Zhongliang Lu ◽  
Dichen Li ◽  
Zhongrui Wang ◽  
...  
Keyword(s):  
High Performance ◽  
Bending Strength ◽  
Gelation Time ◽  
Butyl Alcohol ◽  
Solid Loading ◽  
Green Body ◽  
Excellent Thermal Stability ◽  
Tert Butyl Alcohol ◽  
Rapid Fabrication ◽  
Monomer Content

A high-performance CaO-based integral ceramic mould was fabricated for investment casting by stereolithography (SLA) and non-aqueous gelcasting. The rheology of tert-butyl alcohol (TBA)-based CaO slurries and the effect of gelation parameters on the gelation time and strength of the green body were investigated to obtain a high-quality green body of the CaO-based integral ceramic mould. Then the pre-sintering and sintering processes were optimized to avoid cracks, reduce the sintering shrinkage, and improve the strength of CaO-based ceramic mould. The results showed that the CaO-based slurry with 56 vol % solid loading and 3 wt % dispersant content exhibited high stability and good flowability. The optimized gelation parameters were determined to be a monomer content of 20 wt %, a ratio of crosslinker to monomer of 0.06, an initiator content of 1 wt % and a gelation temperature of 40 °C. A reasonable sintering regime was identified to avoid cracks and guarantee a low shrinkage of 0.6%, a room temperature bending strength of 14.12 MPa and a high temperature (1200 °C) strength of 8.22 MPa. The CaO-based integral ceramic mould fabricated in this study has many advantages including excellent thermal stability, reaction-resistance to molten active alloys, ease of dissolution, and enhanced efficiency and economy in comparison to SiO2 or Al2O3 ceramic moulds.

Dispersing Si3N4 at High Solids Loading - Applied to Protein Forming

2001 ◽  
Vol 206-213 ◽  
pp. 75-78
Author(s):  
O. Lyckfeldt ◽  
Lisa Palmqvist ◽  
Frederic Poeydemenge
Keyword(s):  
High Solids ◽  
Solids Loading ◽  
High Solids Loading
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