Abrasive grains and crude. Chemical analysis of silicon carbide

2021 ◽  
Keyword(s):  
Silicon Carbide ◽  
Chemical Analysis ◽  
Abrasive Grains

Forensic Analysis of Disintegrated Grinding Wheels using the Sem and X-Ray Microanalysis

1976 ◽  
Vol 34 ◽  
pp. 392-393
Author(s):  
John L. Brown
Keyword(s):  
Silicon Carbide ◽  
Aluminum Oxide ◽  
Porous Structure ◽  
Forensic Analysis ◽  
Grinding Wheels ◽  
Fabric Reinforcement ◽  
X Ray ◽  
Abrasive Grains ◽  
High Speeds ◽  
Ceramic Process

Grinding is a microscopic chipping process for removing material from metal or other hard surfaces. This is commonly accomplished by a rotating wheel consisting of abrasive grains bonded into place with a resin or ceramic material. Aluminum oxide and silicon carbide are the usual abrasives. The most frequently used bond is a vitrified composition of feldspars and clays fired in a ceramic process along with a desired mixture of abrasives. This type of wheel is very hard and easily subject to damage and is normally used in a stationary grinding position. For portable hand-held grinding a resin bonded wheel is used. Resinoid wheels have a more porous structure than vitreous wheels and can be used at high speeds for cool cutting. Frequently fabric reinforcement is used within the structure of the wheel, and it may be operated at higher RPM than other types of wheels.

Development of Al-Cu-Fe Quasicrystal-Poly(p-phenylene sulfide) Composites

2000 ◽  
Vol 643 ◽  
Author(s):  
Paul D. Bloom ◽  
K.G. Baikerikar ◽  
James W. Anderegg ◽  
Valerie V. Sheares
Keyword(s):  
Silicon Carbide ◽  
Wear Resistance ◽  
Chemical Analysis ◽  
Fold Increase ◽  
Reinforced Composites ◽  
Volume Loss ◽  
Third Body ◽  
Wear Properties ◽  
X Ray ◽  
Phenylene Sulfide

AbstractQuasicrystalline Al-Cu-Fe powders were used as a novel filler material in poly(p-phenylene sulfide) (PPS). These polymer/quasicrystal composites showed useful properties that may be beneficially exploited in applications such as dry bearings and composite gears. Al-Cu-Fe quasicrystalline filler significantly improved wear resistance to volume loss in polymer-based composites. In addition to improving the composite wear resistance, the Al-Cu-Fe filler showed low abrasion to the 52100 chrome steel counterface. Furthermore, mechanical testing results showed a two-fold increase in the storage modulus of the reinforced composites compared with the polymer samples. In addition, the Al-Cu-Fe filler was compared to its constituent metals, aluminum oxide, and silicon carbide in PPS. Chemical analysis of the wear interface by X-ray spectroscopy indicated the generation of a third body oxide layer during wear. The fabrication in addition to the thermal, mechanical, and wear properties of these unique materials is described.

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