Influence of Carbon Content on Surface Quality of Solid-State Sintered SiC Ceramics

2012 ◽  
Vol 9 (4) ◽  
pp. 847-852 ◽  
Author(s):  
Jianqin Gao ◽  
Jian Chen ◽  
Guiling Liu ◽  
Yongjie Yan ◽  
Zhengren Huang
Keyword(s):  
Solid State ◽  
Carbon Content ◽  
Surface Quality ◽  
Sic Ceramics

Effect of the Carbon Content of Low-Alloy Steels on the Surface Quality of Continuous-Cast Semifinished Products and Rolled Plates

Metallurgist ◽  
2004 ◽  
Vol 48 (5/6) ◽  
pp. 210-213 ◽  
Author(s):  
O. B. Isaev ◽  
V. V. Emel'yanov ◽  
V. V. Kislitsa ◽  
Yu. I. Matrosov ◽  
L. S. Lepikhov
Keyword(s):  
Carbon Content ◽  
Surface Quality ◽  
Low Alloy Steels ◽  
Continuous Cast ◽  
Alloy Steels ◽  
Rolled Plates

The effect of carbon on surface quality of solid-state-sintered silicon carbide as optical materials

2014 ◽  
Vol 89 ◽  
pp. 7-12 ◽  
Author(s):  
Jian Chen ◽  
Zhengren Huang ◽  
Zhongming Chen ◽  
Ming Yuan ◽  
Yan Liu ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Solid State ◽  
Surface Quality ◽  
Optical Materials ◽  
Sintered Silicon

A Study of the Solid-State Reaction for Polishing Sapphires

2012 ◽  
Vol 497 ◽  
pp. 195-199 ◽  
Author(s):  
Qian Fa Deng ◽  
Zhi Xiong Zhou ◽  
Zhao Zhong Zhou ◽  
Ju Long Yuan ◽  
Ji Cui Wang
Keyword(s):  
Solid State ◽  
Surface Quality ◽  
Material Removal Rate ◽  
Surface Finish ◽  
Solid State Reaction ◽  
Material Removal ◽  
Removal Rate ◽  
Substrate Material ◽  
Quality Requirements

As sapphire is an important substrate material, stringent surface quality requirements (i.e., surface finish and flatness) are required. In order to acquire the higher material removal rate and the better surface quality of sapphire, the solid state-reaction were introduced in this paper; abrasive of SiO2 and SiO2 with mixing the MgF2 power were compared to polish sapphire. The result showed that abrasive of SiO2 with mixing the MgF2 can obtain higher material removal rate and better surface quality. The result of the pr

scholarly journals Evaluation of the surface quality of spun materials using topothesy

2021 ◽  
Vol 2 (2) ◽  
pp. 208-216
Author(s):  
Tomasz Blachowicz ◽  
Michal Koruszowic
Keyword(s):  
Solid State ◽  
Structural Properties ◽  
Surface Quality ◽  
Fractal Dimensions ◽  
Helium Ion ◽  
Spatial Morphology ◽  
Ion Microscopy ◽  
Poly Acrylonitrile

Topothesy and fractal dimensions were calculated for poly(acrylonitrile) (PAN) nanofibers mats obtained by electrospinning. These methods enable quantitatively describing and thus comparing solid-state surfaces and detecting fabric errors. The obtained variety of structural properties results from different substrates and after-treatments, e.g. stabilization and carbonization. The change in spatial morphology was reported for different magnification of images obtained with the use of Helium Ion Microscopy (HIM).

Schwingungsüberlagertes Axialformen/Superimposed Oscillated Axial Forming

2020 ◽  
Vol 110 (11-12) ◽  
pp. 838-843
Author(s):  
Philipp Müller ◽  
Bernd-Arno Behrens ◽  
Sven Hübner ◽  
Hendrik Vogt ◽  
Daniel Rosenbusch ◽  
...  
Keyword(s):  
Surface Quality ◽  
Economic Importance ◽  
Combined Effect ◽  
Wird Eine ◽  
Forming Force ◽  
Forming Process ◽  
Forming Technology ◽  
Great Economic Importance ◽  
Gear Geometry

Techniken zur Steigerung der Formgebungsgrenzen in der Umformtechnik sind von hoher wirtschaftlicher Bedeutung. In dieser Arbeit wird eine Schwingungsüberlagerung im Krafthauptfluss eines Axialformprozesses zur Ausprägung einer Verzahnungsgeometrie untersucht. Die Auswirkungen der Schwingung auf die erzielbare Ausfüllung der Zahnkavitäten werden analysiert sowie die Parameter Schmierung und Oberflächengüte der Halbzeuge in ihrer kombinierten Wirkung untersucht. Es konnte eine Reduzierung der mittleren Umformkraft sowie eine Erhöhung der Formfüllung festgestellt werden. Techniques for extending the production limits in forming technology are of great economic importance. In this research, a superimposed oscillation in the main force flow of an axial forming process to form an axial gear geometry is investigated. The effects of the superimposed oscillation on the achievable form-filling of the tooth cavities are analyzed and the parameters lubrication and surface quality of the semi-finished products are investigated in their combined effect. A reduction of the averaged forming force as well as an increase of the form-filling could be achieved.

scholarly journals Face Grinding Surface Quality of High Volume Fraction SiCp/Al Composite Materials

2021 ◽  
Vol 34 (1) ◽  
Author(s):  
Xu Zhao ◽  
Yadong Gong ◽  
Guiqiang Liang ◽  
Ming Cai ◽  
Bing Han
Keyword(s):  
Friction Coefficient ◽  
Surface Morphology ◽  
Surface Quality ◽  
Volume Fraction ◽  
High Volume ◽  
Spindle Speed ◽  
High Volume Fraction ◽  
Machining Parameters ◽  
Al Composite

AbstractThe existing research on SiCp/Al composite machining mainly focuses on the machining parameters or surface morphology. However, the surface quality of SiCp/Al composites with a high volume fraction has not been extensively studied. In this study, 32 SiCp/Al specimens with a high volume fraction were prepared and their machining parameters measured. The surface quality of the specimens was then tested and the effect of the grinding parameters on the surface quality was analyzed. The grinding quality of the composite specimens was comprehensively analyzed taking the grinding force, friction coefficient, and roughness parameters as the evaluation standards. The best grinding parameters were obtained by analyzing the surface morphology. The results show that, a higher spindle speed should be chosen to obtain a better surface quality. The final surface quality is related to the friction coefficient, surface roughness, and fragmentation degree as well as the quantity and distribution of the defects. Lower feeding amount, lower grinding depth and appropriately higher spindle speed should be chosen to obtain better surface quality. Lower feeding amount, higher grinding depth and spindle speed should be chosen to balance grind efficiently and surface quality. This study proposes a systematic evaluation method, which can be used to guide the machining of SiCp/Al composites with a high volume fraction.

Simulation and Productive Practice of 60 Tons Huge Rectangular Ingot by Wind Cooling

2011 ◽  
Vol 233-235 ◽  
pp. 2714-2717
Author(s):  
Xin Gang Ai ◽  
Sheng Li Li ◽  
Dong Wei Zhang ◽  
Nan Lv ◽  
Jun Tao
Keyword(s):  
Mathematical Simulation ◽  
Surface Quality ◽  
Solidification Time ◽  
Special Method ◽  
Cooling Process ◽  
Heavy Plate ◽  
Simulation Results

Huge rectangular ingots becomes crying needs in the condition of lots of heavy plate mills more than 5m have been in operation. In this paper, a special method of wind cooling outside mould has been presented and applied to produce 60t rectangular ingot. Mathematical simulation results tell us that by wind cooling, the solidification time of the 60t ingot can be shortened by 67 minutes, internal soundness can be ensured. The wind cooling process can obviously improve microstructure and preventing skull patch by increasing the thickness of solidified shell. A 60 tons huge rectangular ingot is successfully produced by wind cooling, the surface quality of is very well and the internal soundness should be improved further.

Synthesis of high-temperature thermally expandable microcapsules and their effects on foaming quality and surface quality of foamed ABS materials

e-Polymers ◽  
2020 ◽  
Vol 20 (1) ◽  
pp. 519-527
Author(s):  
Wei Gong ◽  
Xianglin Pei ◽  
Xiaogang Yin ◽  
Daming Ban ◽  
Hai Fu ◽  
...  
Keyword(s):  
High Temperature ◽  
Surface Quality ◽  
Volume Fraction ◽  
Crosslinking Agent ◽  
Acrylonitrile Butadiene Styrene ◽  
Foaming Agent ◽  
Blowing Agent ◽  
Good Surface ◽  
Butadiene Styrene

AbstractIn this paper, acrylonitrile and hydroxypropyl acrylate are used as the binary polymerization monomers, and isooctane is used as the foaming agent to prepare high-temperature thermally expandable microcapsules. Analysis of the effect of blowing agent and crosslinking agent on the expansion properties of high-temperature thermally expandable microcapsules, the effects of foaming agent azodicarbonamide (ADCA) and micro-expansion capsule on the surface quality and foaming quality of foamed acrylonitrile–butadiene–styrene (ABS) products were investigated. The foamed product prepared by the high-temperature microcapsule has a good surface quality, the gloss is 52.3, the cell is not easily deformed, and the volume fraction is 4%; the foamed ABS/ADCA material has poor cell uniformity, the cell is easily deformed, the volume fraction is 6.5%, the surface quality is poor, and the gloss is only 8.7.

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