Improvements to the fine dry grinding of technical alumina in tube mills

The undertaken research which is described in this paper aims at the corrosion behaviour of composite coatings in nickel matrix using as dispersed phase technical alumina with dimensions of 5 μm and their characterization from a microstructural point of view. The corrosion resistance in the saline fog of the coatings is influenced by the microstructure, the stresses developed in the layer and the roughness.

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Effect of TiO2 and MgO on Microstructure of α-Alumina Ceramics and its Sintering Behavior

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1112.519 ◽

2015 ◽

Vol 1112 ◽

pp. 519-523 ◽

Cited By ~ 2

Author(s):

Jarot Raharjo ◽

Sri Rahayu ◽

Tika Mustika ◽

Masmui ◽

Dwi Budiyanto

Keyword(s):

Mechanical Properties ◽

Sintering Temperature ◽

Physical And Mechanical Properties ◽

Basic Material ◽

Sintering Behavior ◽

Pressureless Sintering ◽

Alumina Ceramics ◽

Density Measurements ◽

Technical Alumina ◽

Platelet Structure

Observation on the effect of adding titanium oxide (TiO2) and magnesium oxide (MgO) on the sintering of α-alumina (Al2O3) has been performed. In this study, technical alumina used as basic material in which the sample is formed by the pressureless sintering/cold press and sintered at 1500°C which is lower than alumina sintering temperature at 1700°C. Elemental analysis, observation of microstructure, hardness, fracture toughness and density measurements were carried out to determine the physical and mechanical properties of alumina. The results indicate a change in the microstructure where the content of the platelet structure are much more than the equilateral structure. At sintering temperature of 1500°C, neck growth occurs at ceramics grain, supported by the results of the density test which indicate perfect compaction has occurred in this process.

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

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.329.57 ◽

2007 ◽

Vol 329 ◽

pp. 57-62 ◽

Cited By ~ 2

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.

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Mechanochemical effects for some Al2O3 powders of dry grinding

Journal of Materials Science ◽

10.1007/bf00543939 ◽

1992 ◽

Vol 27 (2) ◽

pp. 465-471 ◽

Cited By ~ 10

Author(s):

T. Ban ◽

K. Okada ◽

T. Hayashi ◽

N. Ōtsuka

Keyword(s):

Dry Grinding

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Investigation on Surface Grinding of Ti-6Al-4V Using Minimum Quantity Lubrication

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.500.308 ◽

2012 ◽

Vol 500 ◽

pp. 308-313 ◽

Cited By ~ 2

Author(s):

Guo Qiang Guo ◽

Zhi Qiang Liu ◽

Xiao Hu Zheng ◽

Ming Chen

Keyword(s):

Surface Roughness ◽

Plastic Deformation ◽

Surface Morphology ◽

Specific Energy ◽

Minimum Quantity Lubrication ◽

Grinding Force ◽

Dry Grinding ◽

Surface Damages ◽

Side Flow ◽

Mql System

This paper investigates the effects of MQL system on the grinding performance of Ti-6Al-4V using SiC abrasive, the evaluation of the performance consisted of analyzing the grinding force, surface roughness and surface morphology. The experiment result indicated that the favorable lubricating effect of MQL oil makes it has the lowest value of grinding force, specific energy and force raito. MQL has better surface finish than dry grinding and fluid grinding has the lowest value of surface roughness under different grinding depth. Surface damages such as: side flow, plastic deformation, redeposition are present in dry and fluid grinding. As grinding depth increased, the damages become much more severe. But in MQL condition, it gives better surface integrity than dry and fluid grinding.

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