Sintering Densification in Fabrication of Particle Reinforced Ceramic

2012 ◽  
Vol 184-185 ◽  
pp. 1194-1197
Author(s):  
Bin Li ◽  
Hong Wang
Keyword(s):  
Microstructure Evolution ◽  
Processing Conditions ◽  
Processing Variables

Particle reinforced ceramics can be fabricated by a variety of methods, some of which have their origins in early civilization. The key objective of sintering studies is therefore to understand how the processing variables influence the microstructure evolution. In this way, useful information can be provided for the practical effort of designing processing conditions for producing the required microstructure.

Preparation of Nanoemulsion

2022 ◽  
pp. 24-43
Author(s):  
Elaine Elaine ◽  
Kar Lin Nyam
Keyword(s):  
Delivery System ◽  
Processing Parameters ◽  
Optimization Process ◽  
Processing Conditions ◽  
Related Field ◽  
Future Studies ◽  
Processing Variables

Nanoemulsion is a versatile emulsion-based delivery system that can be structured or prepared with different compositions, methods, or processing variables. Although single nanoemulsion has been a promising delivery carrier in numerous industries, the innovation of double nanoemulsion is introduced to provide different benefits. However, the nanoemulsion must be optimized in terms of the composition and emulsification methods to maintain the integrity of the delivery system. Therefore, the optimization of nanoemulsion can range from deciding the type and concentration of compositions (aqueous, lipid, surfactants) to the processing conditions during emulsification. The current options of emulsification methods, processing parameters, and optimization process of nanoemulsion are highlighted and elaborated in this chapter. This allows readers to understand the fundamental principles of nanoemulsion preparation and encourage future studies and applications in the related field.

Efecto de las condiciones de procesamiento, contenido de grasa y grado de frescura de la materia prima en la calidad de filetes de bagre ahumados / Effect of processing conditions, lipids content and freshness on acceptability of smoked catfish

1999 ◽  
Vol 5 (2) ◽  
pp. 167-176 ◽  
Author(s):  
E. Tomé ◽  
M. Kodaira ◽  
Y. Matsunaga
Keyword(s):  
Salt Concentration ◽  
Sensory Attributes ◽  
Processing Conditions ◽  
Fatty Fish ◽  
Moisture Contents ◽  
Dehydration Rate ◽  
Processing Variables ◽  
Raw Fish ◽  
Better Than

This work has evaluated the effect of processing conditions on the acceptance of smoked catfish (P. fasciatum). The processing variables studied were thickness (1.9 and 3.6 cm), salting time (30, 60 and 90 min) and smoking time (4, 5 and 6 h at varying temperatures). The influence of the species (P. pirinampu and P. fasciatum) and the freshness of the fillets were also studied. Smoked fillets of 1.9 cm thickness had moisture contents significantly (p < 0.05) lower and the salt concentration was significantly greater than in the salted smoked fillets of 3.6 cm thickness. The thinner fillets received the greatest scores for texture and appearance. Concerning salting time, fillets salted for 30 min received the greatest score for overall acceptance. The greatest dehydration rate ocurred during the first 3 h of smoking at temperatures between 30 and 50°C. Color and texture of products with 5 h and 6 h of smoking were better than those with only 4 h. Lipids content greatly affected sensorial acceptance of smoked products; fillets from P. pirinampu, a fatty fish, received the lowest score for all the sensory attributes evaluated. The loss of freshness of raw fish affected negatively the odor, appearance and overall acceptance of the products.

scholarly journals Influence of Processing Conditions on Melt Blown Web Structure: Part 2 -Primary Airflow Rate

2005 ◽  
Vol os-14 (2) ◽  
pp. 1558925005os-14 ◽  
Author(s):  
Randall R. Bresee ◽  
A. Qureshi ◽  
Matthew C. Pelham
Keyword(s):  
Pore Structure ◽  
Fiber Orientation ◽  
Structural Features ◽  
Airflow Rate ◽  
Processing Conditions ◽  
Detailed Structure ◽  
Web Structure ◽  
Processing Variables ◽  
Polypropylene Melt

We are continuing an effort to quantitatively measure the influence of processing variables on the detailed structure of commercial polypropylene melt blown (MB) webs. In this paper, we report the influence of primary airflow rate on fiber entanglement, global fiber orientation and pore structure in webs. This enabled us to quantify the influence of primary airflow on web structural features as well as achieve greater understanding of the commercial MB process.

Overview of metallurgical studies on weld deposited surface by plasma transferred arc technique

2021 ◽  
Vol 118 (1) ◽  
pp. 111
Author(s):  
Vivek D. Kalyankar ◽  
Hardik V. Naik
Keyword(s):  
Welding Current ◽  
Travel Speed ◽  
Surface Characteristic ◽  
Advanced Materials ◽  
Processing Conditions ◽  
Microstructural Changes ◽  
Carbide Phases ◽  
Plasma Transferred Arc ◽  
Processing Variables ◽  
Transferred Arc

Research on plasma transferred arc (PTA) coatings has increased contemplation due to its augmented appropriateness which results from the advanced materials used in applications like mining, petroleum and power plant sectors. This article further broadens the research scope of investigation, by influencing metallurgical and processing aspects in accordance with the significance of microstructural changes. Martensitic formation with coarser structure, carbide phase formation and fine interdendritic eutectic matrix are the significant metallurgical aspects for an improved surface characteristic. Welding current, powder feed rate and travel speed, are the significant processing variables to achieve the microstructural changes like uniform dendritic growth, finer grain size, etc. The addition of alloying elements and heat treatment are the most observed processing conditions for the formation of precipitates and carbide phases. A schematic summary, the significance of processing variables, processing conditions and process modelling and simulation on metallurgical aspects have been enumerated in this paper. Further, critical comments and findings from in-depth review have also been discussed for the future scope. Hence, this review will be helpful to ascertain the relation among the microstructural evolution, the applicability of microscopic tools and the mechanical properties for the forthcoming researchers and the industrial persons.

Evaluation of the effect of processing conditions on the impact properties of polypropylene-nano-CaCO3 composites

2017 ◽  
Vol 51 (24) ◽  
pp. 3365-3372 ◽  
Author(s):  
Marisa Cristina Guimarães Rocha ◽  
Gisele Fonseca Moreira ◽  
Antonio Henrique Monteiro Fonseca Thomé da Silva
Keyword(s):  
Response Surface Methodology ◽  
Filler Content ◽  
Rotation Speed ◽  
Impact Resistance ◽  
Significant Loss ◽  
Processing Conditions ◽  
Impact Properties ◽  
Polypropylene Composites ◽  
Processing Variables ◽  
The Impact

Processing variables are known to have a decisive influence on the impact properties of polypopylene-nano-CaCO3 composites. Therefore, it becomes mandatory to evaluate the effect of extrusion conditions on composite impact resistance. In the present work, a response surface methodology was used to evaluate the effects of screw rotation speed, screw configuration, and nanoparticles content on the polypropylene impact properties. The concentration of the nano-CaCO3 particles, the screw rotation speed, and the interaction between these entrance factors were the processing variables of greater influence on the impact properties of nano-CaCO3/polypropylene composites. The increase of screw rotation speed led to a decrease in the impact resistance, while the increase of filler content promoted an increase of such property. However, the increase of nanoparticles content led to obtaining poor tensile properties. Therefore, the filler content has to be adjusted in order to improve the impact properties without significant loss of mechanical strength.

Properties of Pt/Ti Contacts to III-V Materials

1990 ◽  
Vol 216 ◽  
Author(s):  
A. Katz ◽  
S. Nakahara ◽  
S. N. G. Chu ◽  
B. E. Weir ◽  
C. R. Abemathy ◽  
...  
Keyword(s):  
Electron Beam ◽  
Electrical Properties ◽  
Microstructure Evolution ◽  
Thermal Processing ◽  
Rapid Thermal Processing ◽  
Electron Beam Evaporation ◽  
Semiconductor Materials ◽  
Processing Conditions ◽  
Ternary Semiconductor ◽  
P Type

ABSTRACTPt/Ti contact to variety of binary III-V and related ternary semiconductor materials were established. These contacts were formed by electron beam evaporation and subsequent rapid thermal processing in order to sinter the metal-semiconductor systems. The contacts to p-type InAs, GaAs, In0.53Ga0.43As, In0.52Al0.4As and Ga0.7Al0.3As were ohmic, as a result of heating at temperatures of 450°C or higher. The Pt/Ti contacts to InP and GaP displayed Schottky behavior as-deposited and preserved the rectifying nature through heat treatments, regardless of the processing conditions. The electrical properties and the microstructure evolution in these 7 systems is discussed in this paper.

Compaction Issues in Powder Metallurgy

MRS Bulletin ◽  
1997 ◽  
Vol 22 (12) ◽  
pp. 29-33 ◽  
Author(s):  
William R. Blumenthal ◽  
Haskell Sheinberg ◽  
Sherri A. Bingert
Keyword(s):  
Powder Metallurgy ◽  
Processing Conditions ◽  
Step Process ◽  
Critical Step ◽  
Uniform Microstructure ◽  
Processing Variables ◽  
Shaped Part ◽  
Key Variables ◽  
Multiple Step ◽  
Low Porosity

Powder metallurgy (P/M) involves a multiple-step process to prepare and consolidate granulated metal and composites into near-net-shaped components. The modern P/M method starts with a precisely defined final geometry and a set of properties for a desired component. Decisions are then made about a variety of processing variables, recognizing that many variables strongly interact counter to the desired properties. Finally preproduction fabrication trials are conducted to optimize key variables until he specifications are achieved, and the processing conditions are established. A critical step in the overall process is the compaction of powder into a sufficiently strong, low-porosity, properly shaped part with uniform microstructure that can be sintered, or alternately heated and pressed to the final dimensions and properties.

Formation of defects in implanted hipox-structures

1992 ◽  
Vol 50 (2) ◽  
pp. 1406-1407
Author(s):  
Peter Pegler ◽  
N. David Theodore ◽  
Ming Pan
Keyword(s):  
High Pressure ◽  
Cross Section ◽  
Semiconductor Devices ◽  
Silicon Substrates ◽  
Processing Conditions ◽  
Pressure Oxidation ◽  
Deep Trench ◽  
Local Oxidation ◽  
Trench Isolation ◽  
And Behavior

High-pressure oxidation of silicon (HIPOX) is one of various techniques used for electrical-isolation of semiconductor-devices on silicon substrates. Other techniques have included local-oxidation of silicon (LOCOS), poly-buffered LOCOS, deep-trench isolation and separation of silicon by implanted oxygen (SIMOX). Reliable use of HIPOX for device-isolation requires an understanding of the behavior of the materials and structures being used and their interactions under different processing conditions. The effect of HIPOX-related stresses in the structures is of interest because structuraldefects, if formed, could electrically degrade devices.This investigation was performed to study the origin and behavior of defects in recessed HIPOX (RHIPOX) structures. The structures were exposed to a boron implant. Samples consisted of (i) RHlPOX'ed strip exposed to a boron implant, (ii) recessed strip prior to HIPOX, but exposed to a boron implant, (iii) test-pad prior to HIPOX, (iv) HIPOX'ed region away from R-HIPOX edge. Cross-section TEM specimens were prepared in the <110> substrate-geometry.

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