Semi-Solid Casting of Aluminium - Scandium (Zr) Foundry Alloys

2001 ◽  
Author(s):  
A. Hoelzl ◽  
H. Kaufmann ◽  
V. Konkevich
Keyword(s):  
Foundry Alloys ◽  
Semi Solid

New Developments with the SEED Technology

2012 ◽  
Vol 192-193 ◽  
pp. 373-378 ◽  
Author(s):  
Pascal Côté ◽  
Marie Eve Larouche ◽  
X. Grant Chen
Keyword(s):  
Alloy Development ◽  
New Developments ◽  
Seed Technology ◽  
Optimization Of Process Parameters ◽  
Process Reliability ◽  
Foundry Alloys ◽  
Cast Alloys ◽  
Semi Solid ◽  
Industry Needs

The SEED technology, a rheocasting process based on the slurry-on-demand approach, is an emerging technology that was developed in the mid-2000s. Many publications with regard to the process and to alloy development using this technology were made since, and several industrial units are operated worldwide. Moreover, the process is still actively developed and is fully supported by a team of scientists, engineers and technicians. With a global objective of addressing the user requirements and the industry needs, works were conducted toward optimization of the process and equipment. At first, the focus was on developing a simplified version of the SEED process to eliminate the so-called “drainage” phase while preserving the prime quality of the slurry produced. Improvement of some system components and integration of new features were also targeted to secure the overall equipment efficiency (OEE) and increase the process reliability. This work, backed with the optimization of process parameters and comprehensive techniques adapted for semi solid casting, led to the consolidation and even improvement of the properties of the parts produced for the common foundry alloys 356/357 and 319. Furthermore, the non-drained SEED version was applied to the validation of the process capabilities for uncommon cast alloys with works on 6061 wrought alloy, Duralcan metal matrix composite, and others. The results confirmed that the SEED process can efficiently be used in non-drained mode and achieve the same quality of slurry as the drained version originally developed. It is now proven in the industrial scale and actually integrated in the updated industrial equipment. Moreover, the capabilities of the process for special alloys and applications are still the subject of active development works.

scholarly journals Comparison of the semi-solid constitutive behaviour of A356 and B206 aluminum foundry alloys

2019 ◽  
Vol 266 ◽  
pp. 37-45 ◽  
Author(s):  
F. Sheykh-jaberi ◽  
S.L. Cockcroft ◽  
D.M. Maijer ◽  
A.B. Phillion
Keyword(s):  
Constitutive Behaviour ◽  
Foundry Alloys ◽  
Semi Solid

Self-microemulsion Technology for Water-insoluble Drug Delivery

2019 ◽  
Vol 15 (6) ◽  
pp. 576-588 ◽  
Author(s):  
Beibei Yan ◽  
Yu Gu ◽  
Juan Zhao ◽  
Yangyang Liu ◽  
Lulu Wang ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Drug Delivery Systems ◽  
Aqueous Solubility ◽  
Delivery Systems ◽  
Poorly Soluble Drugs ◽  
New Chemical Entities ◽  
Poorly Soluble ◽  
Water Insoluble Drug ◽  
Semi Solid ◽  
Solidification Technology

: According to the drug discovery, approximately 40% of the new chemical entities show poor bioavailability due to their low aqueous solubility. In order to increase the solubility of the drugs, self-micro emulsifying drug delivery systems (SMEDDS) are considered as an ideal technology for enhancing the permeability of poorly soluble drugs in GI membranes. The SMEDDS are also generally used to enhance the oral bioavailability of the hydrophobic drugs. At present, most of the self-microemulsion drugs are liquid dosage forms, which could cause some disadvantages, such as the low bioavailability of the traditional liquid SMEDDS. Therefore, solid self-micro emulsifying drug delivery systems (S-SMEDDS) have emerged widely in recent years, which were prepared by solidifying a semi-solid or liquid self-emulsifying (SE) ingredient into a powder in order to improve stability, treatment and patient compliance. The article gives a comprehensive introduction of the study of SMEDDS which could effectively tackle the problem of the water-insoluble drug, especially the development of solidification technology of SMEDDS. Finally, the present challenges and the prospects in this field were also discussed.

scholarly journals Routes for salmonella contamination of poultry meat: epidemiological study from hatchery to slaughterhouse

2002 ◽  
Vol 129 (2) ◽  
pp. 253-265 ◽  
Author(s):  
M. HEYNDRICKX ◽  
D. VANDEKERCHOVE ◽  
L. HERMAN ◽  
I. ROLLIER ◽  
K. GRIJSPEERDT ◽  
...  
Keyword(s):  
Horizontal Transmission ◽  
Poultry Meat ◽  
Contamination Level ◽  
Solid Agar ◽  
Determining Factors ◽  
Production Stages ◽  
Animal Material ◽  
Semi Solid ◽  
Therapeutic Doses ◽  
Broiler House

Data were collected on the prevalence of salmonella at different stages during the life cycle of 18 broiler flocks on different farms as well as during slaughter in different poultry slaughterhouses. For the isolation of salmonella, the highest sensitivity (93.9%) was obtained by enrichment in the semi-solid agar Diasalm. The ‘overshoe method’ utilizing several pairs of overshoes provided the highest sensitivity for determining the salmonella status of the broilers during rearing. A clear decrease of the relative importance of the first production stages was demonstrated for the salmonella contamination of the end product, whereas horizontal transmission of salmonella to broilers during rearing and to broiler carcasses in the slaughterhouse was shown to be the main determinative factor. Ten of the 18 flocks received a salmonella positive status with the highest shedding occurring during the first 2 weeks of rearing. The shedding of the animals was significantly negatively influenced by the use of subtherapeutic or therapeutic doses of antibiotics. The intake of portable material in the broiler house was identified as the most important risk factor for horizontal transmission. Significant associations were found between the contamination level of a flock and hygiene of the broiler house, feed and water in the broiler house and both animal and non-animal material sampled in the environment. No correlation was found between contamination during the rearing period and contamination found after slaughtering. The presence of faecal material in the transport crates and predominantly the identity of the slaughterhouse seemed to be the determining factors for carcass quality. Improved hygiene management during transport of broilers and in some slaughterhouses could significantly reduce the risk of salmonella contamination of poultry meat.

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