Results 91 to 100 of about 8,911 (275)

Influence of sand base preparation on properties of chromite moulding sands with sodium silicate hardened with selected methods

Archives of Metallurgy and Materials, 2017
The paper presents a research on the relation between thermal preparation of chromite sand base of moulding sands containing sodium silicate, hardened with selected physical and chemical methods, and structure of the created bonding bridges.
Stachowicz M., Granat K., Pałyga Ł.
doaj   +1 more source

Thermo-Insulating Moulding Sand for thin Walled Castings

Archives of Metallurgy and Materials, 2014
Abstract In paper the selection of the composition and determination of main properties of novel moulding sand was described. The mail goal was to create moulding sand characterized by high thermal insulating properties in relations with low specific weight. This type of moulding sand will find application in thin walled castings with complex geometry,
Cholewa M., Szuter T.
openaire   +2 more sources

Liquid Jetting‐Based Miniature Robotic Navigation in Confined Fluidic Spaces

Advanced Intelligent Systems, EarlyView.
We introduce a new class of liquid‐jetting‐based miniature robots (JetBots) ranging in size from mm‐to‐cm, featuring a unified approach in design, fabrication, and actuation. They demonstrate fast locomotion (30.3 cm/s), rapid steering (648.8°/s), and diverse functions, such as puncturing soft materials and unlimited cargo sampling and delivery, paving
Debasish Roy, Tianlu Wang
wiley   +1 more source

Civilian Occupational Exposure to Vapors, Gas, Dust, or Fumes and Respiratory Health Among United States Military Veterans

American Journal of Industrial Medicine, EarlyView.
ABSTRACT Background We investigated associations of self‐reported and job exposure matrix (JEM) assigned civilian occupational exposure to vapors, gas, dust, or fumes (VGDF) with respiratory symptoms among previously deployed US Veterans. Methods An interviewer‐administered questionnaire ascertained self‐reported civilian occupational VGDF exposure.
Sahra Mohazzab‐Hosseinian, Carrie A. Redlich, Anna M. Korpak, Andrew K. I. Timmons, Nicholas L. Smith, Karen S. Nakayama, Farrah Kheradmand, Vincent S. Fan, Michael Jerrett, Philippe R. Montgrain, Christine H. Wendt, Ware G. Kuschner, Emily S. Wan, Eric Garshick, Paul D. Blanc   +14 more
wiley   +1 more source

Investigations of Physicochemical Properties and Thermal Utilisation of Dusts Generated in the Mechanical Reclamation Process of Spent Moulding Sands

Archives of Metallurgy and Materials, 2015
The after reclamation dusts originated from various foundry plants, applying moulding sands with organic binding agents, mostly resins, are characterised by different properties in dependence of the used binders, reclamation systems, spent sands ...
Dańko R., Holtzer M., Dańko J.
doaj   +1 more source

Improved Dry‐Pressing Strategy for Fabricating Double‐Sided Rough YSZ Electrolyte Thin Films and Their Performance in Solid Oxide Cells

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT This study addresses limitations of the conventional dry‐pressing method for electrolyte‐supported films—smooth surfaces, excessive thickness, and fragile supports inducing damage. We propose an innovative camphor–quartz sand composite architecture to construct a five‐layer (camphor/quartz sand/YSZ/quartz sand/camphor) system, enabling thin ...
Hong Chang, Hewei Xu, Haoyu Li, Jiachun Niu, Lina Zhang, Chenying Yao, Yiyi Zhang, Huili Chen, Chuan Dong   +8 more
wiley   +1 more source

Examination and analysis of influence of compaction degree on dielectricproperties of moulding sand components

Metalurgija, 2015
In the paper, presented are results of a research on influence of compaction degree on dielectric properties of components of moulding sands. During recent years, intensive research works on possibilities of using microwave heating in foundry technique ...
D. Nowak, K. Granat, B. Opyd
doaj  

Effect of Sand Wetting on Physically Hardened Moulding Sands Containing a Selected Inorganic Binder. Part 2

Archives of Foundry Engineering, 2016
In the paper, an attempt is made to explain the previously observed increased effectiveness of utilising hydrated sodium water-glass grade 137 after hardening moulding sands with selected physical methods.
Stachowicz M., Granat K., Pałyga Ł.
doaj   +1 more source

Preparation and Performance Evaluation of a Self‐Generated Particle Plugging Agent Based on Thermosetting Resin

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT A thermosetting in situ curing resin microsphere system has been developed. It has controllable phase transition time and particle size. This system addresses the current challenges of low strength, shear susceptibility, and short phase transition time in polymer microsphere blockers and thermoplastic particle blockers.
Baolei Jiao, Lifeng Chen, Minghao Xue, Xuemin Yan, Jiamin Zhang, Feifan Liu   +5 more
wiley   +1 more source

Influence of the Changes of the Structure of Foundry Bentonites on Their Binding Properties

Medžiagotyra, 2012
In this paper, the effects of the examination of the structure of calcium bentonites, activated by sodium carbonate, applied in the foundry industry as a binding agent for moulding sands, subjected to the effects of high temperature, were presented.
Sylwia ŻYMANKOWSKA-KUMON, Mariusz HOLTZER, Ewa OLEJNIK, Artur BOBROWSKI   +3 more
doaj   +1 more source