Ferrite Sphere Grinding Technique

1959 ◽  
Vol 30 (10) ◽  
pp. 946-947 ◽  
Author(s):  
John L. Carter ◽  
Edward V. Edwards ◽  
Irving Reingold ◽  
Donald L. Fresh
Keyword(s):  
Ferrite Sphere ◽  
Grinding Technique

Study on the Formation of Grind-Hardening of Steel AISI 1066

2007 ◽  
Vol 329 ◽  
pp. 57-62 ◽  
Author(s):  
Ju Dong Liu ◽  
Gui Cheng Wang ◽  
B.L. Wang ◽  
K.M. Chen
Keyword(s):  
Hardened Layer ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Micro Hardness ◽  
Cooling Conditions ◽  
Dry Grinding ◽  
Structures And Properties ◽  
Grind Hardening ◽  
Steel Aisi ◽  
Grinding Technique

Grind-hardening was done on Steel AISI 1066 with a conventional surface grinder and a corundum grinding wheel, and research was conducted to probe into structures and properties of the hardened layer under varied depth of cut and cooling conditions. Results show that the hardened layer do not change noticeably in their martensitic structures and micro-hardness, which is ranged between 810870HV; But when the depth of cut increased or the dry grinding technique is adopted, the concentration of martensites and carbonides becomes lower, while the amount of residual austenites increases, and the completely hardened zone gets thicker. This conclusion serves as an experimental basis for the active control of properties of the grind-hardened layer of Steel AISI 1066.

Simulation Investigation of Tangential-Feed Centerless Grinding Process Performed on Surface Grinder

2009 ◽  
Vol 626-627 ◽  
pp. 23-28
Author(s):  
Wei Xing Xu ◽  
Yong Bo Wu ◽  
Takashi Sato ◽  
Wei Min Lin
Keyword(s):  
Elastic Deformation ◽  
Process Parameters ◽  
Simulation Method ◽  
Machining Accuracy ◽  
Grinding Process ◽  
Elasticity Parameter ◽  
Grinding Method ◽  
Centerless Grinding ◽  
Simulation Results ◽  
Grinding Technique

In our previous study, a new centerless grinding method using surface grinder was proposed. This paper describes a simulation method for investigating the workpiece rounding process in which a model taking the elastic deformation of the machine into consideration is created, and revealing how the process parameters affect the machining accuracy in the new grinding technique. In addition, a practice way to determine the machining-elasticity parameter showing the elastic deformation is developed. The simulation results are compared to show the effect of process parameters on the machining accuracy.

Development of Small Tool by Micro Fabrication System Applying Elid Grinding Technique

2005 ◽  
pp. 491-495 ◽  
Author(s):  
Yoshihiro Uehara ◽  
Hitoshi Ohmori ◽  
Yutaka Yamagata ◽  
Sei Moriyasu ◽  
Weimin Lin ◽  
...  
Keyword(s):  
Micro Fabrication ◽  
Elid Grinding ◽  
Grinding Technique ◽  
Small Tool

scholarly journals Preparation, characterization of spherical 1,1-diamino-2,2-dinitroethene (FOX-7), and study of its thermal decomposition characteristics

RSC Advances ◽  
2021 ◽  
Vol 11 (53) ◽  
pp. 33522-33530
Author(s):  
Xinhua Zhao ◽  
Dan He ◽  
Xiaoping Ma ◽  
Xueying Liu ◽  
Zishuai Xu ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Thermal Behavior ◽  
Crystal Morphology ◽  
Size Structure ◽  
Crystallization Method ◽  
Cooling Crystallization ◽  
Grinding Technique

Spherical FOX-7 was produced via a combination of cooling crystallization method and repeated grinding technique, and the crystal morphology, size, structure, and thermal behavior were systematically investigated in detail.

scholarly journals SOLVENT FREE SYNTHESIS OF CHALCONE AS ANTIBACTERIAL SUBSTANCE

2017 ◽  
Vol 13 (1) ◽  
pp. 95
Author(s):  
Susy Yunita Prabawati ◽  
Arifah Khusnuryani ◽  
Khamidinal Khamidinal
Keyword(s):  
Antibacterial Activity ◽  
Solvent Free ◽  
Hydration Reaction ◽  
Antibacterial Substance ◽  
E Coli ◽  
H Nmr ◽  
Activity Test ◽  
Grinding Technique ◽  
Solvent Free Synthesis

<p>The aims of this study was to synthesize a compound of 3-methoxy-4-hydroxychalcone through Claisen-Schmidt condensation with grinding technique (solvent-free). Vanillin, acetophenone and 60 % NaOH catalyst used in this synthesis. Characterization of products was done with a spectrophotometer FTIR and <sup>1</sup>H-NMR spectrometer. The  product was obtained as a orange solid which has a melting point at    58 - 59 ˚C. Identification of the product by IR spectrophotometer showed the absorption of  C=C in the wavenumber of 1496.76 cm<sup>-1</sup> which confirmed that the hydration reaction of chalcone had occurred. Analysis using <sup>1</sup>H-NMR spectrometer also showed the proton of the CH=CH appearing on chemical shift (δ) 7.99 ppm. The antibacterial activity test showed that the compounds of 3-methoxy-4- hydroxychalcone has a potential as an antibacterial against bacteria <em>E. coli</em> and <em>B. subtilis</em>.</p>

scholarly journals Improved Synthesis of 2',6'-Dihydroxy-3,4-dimethoxy Chalcone by Grinding Technique to Synthesize 5-Hydroxy-3',4'-dimethoxy Flavone

2014 ◽  
Vol 14 (2) ◽  
pp. 174-178 ◽  
Author(s):  
Elfi Susanti VH ◽  
Sabirin Matsjeh ◽  
Mustofa Mustofa ◽  
Tutik Dwi Wahyuningsih
Keyword(s):  
1H Nmr ◽  
Conventional Method ◽  
13C Nmr ◽  
Condensation Reaction ◽  
Grinding Technique

5-hydroxy-3',4'-dimethoxy flavone can be efficiently synthesized in two steps via the formation of 2',6'-dihydroxy-3,4-dimethoxy chalcone with good results. 2',6'-dihydroxy-3,4-dimethoxy chalcone as reactants for synthesis of flavones was prepared through Claisen-Schmidt condensation reaction between 2,6-dihydroxyacetophenones,3,4-dimethoxybenzaldehyde and solid NaOH in mortar for 15 min. The yield of the product (70%) is higher than conventional method (65%). This chalcone then oxidatively cyclized with iodine to form 5-hydroxy-3',4'-dimethoxy flavone (yield 62%). Compounds synthesized were characterized by spectroscopic (IR, 1H-NMR, and 13C-NMR).

Measurement and alleviation of subsurface damage in a thick-crystal neutron interferometer

2019 ◽  
Vol 75 (6) ◽  
pp. 833-841 ◽  
Author(s):  
Benjamin Heacock ◽  
Robert Haun ◽  
Katsuya Hirota ◽  
Takuya Hosobata ◽  
Michael G. Huber ◽  
...  
Keyword(s):  
High Precision ◽  
Chemical Etching ◽  
Subsurface Damage ◽  
Interference Signal ◽  
Precision Grinding ◽  
Angular Misalignment ◽  
Thick Crystal ◽  
Neutron Interferometer ◽  
Grinding Technique ◽  
Spatially Varying

The construction is described of a monolithic thick-crystal perfect silicon neutron interferometer using an ultra-high-precision grinding technique and a combination of annealing and chemical etching that differs from the construction of prior neutron interferometers. The interferometer is the second to have been annealed after machining and the first to be annealed prior to chemical etching. Monitoring the interference signal at each post-fabrication step provides a measurement of subsurface damage and its alleviation. In this case, the strain caused by subsurface damage manifests itself as a spatially varying angular misalignment between the two relevant volumes of the crystal and is reduced from ∼10−5 rad to ∼10−9 rad by way of annealing and chemical etching.

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