Alumina grit

Figure 7. Influence of the hardness of the grinding grit on the rate of removed material on grinding the cross-section of a steel tube (flexible disc, different alumina grits the results have been normalized for a unified grit toughness of Kic = 3.6 MPam to demonstrate the hardness effect without the additional influence of Aijc) [12].

Figure 10. Microstructure of sol/gel derived sintered alumina grits (a) platelet shaped microstructure ( Cubitron , manufactured by MMM, USA), (b) bimodal grain size distribution after seeding with transitional alumina nuclei, (c) anisotropic grain growth (Ce doping) [16].

Sintered Alumina Grits Produced by Powder Processing Approaches... 

Degrease, light grit blast (alumina grit), degrease. 24.8 31.4 16.0 18.3... 

Fig. 2. XPS survey spectrum of aluminium sheet blast cleaned with alumina grit (by courtesy of Acharawan Rattana, University of Surrey)...

A related issue is whether roughening a surface increases the strength of an adhesive joint. Harris and Beevers [82] found no difference in adhesion to mild steel and aluminium alloy blasted with alumina grits of different particle sizes. Shahid and Hashim [83] used a structural epoxide adhesive with mild steel adherends in cleavage joints. The surfaces had been grit-blasted or diamond-polished, and surface profiled. The results are shown in Table 15, where all differences in strength seem to be the same, within experimental scatter. 

PEI Test. An abrasive charge consisting of steel balls, alumina grit and deionized or distilled water is rotated on the surface whose abrasion resistance is to be assessed. An abraded circle 80mm diameter is produced. Glazed tiles thus tested lose only little material, and their abrasion resistance is assessed by a visual estimate of gloss and colour under standard lighting conditions after 150,... 

Remove surface deposits with nonmetallic agent— (A) alumina grit paper. 

Figure 3 Surface detritus ultramicrotomed/TEM micrograph through an alumina grit-blasted Alclad 2024-T3 substrate.

After the substrates have been cleaned, the surface to be bonded is abraded using a dry grit-blasting process [53] which uses alumina grit with a particle size range... 

The interfacial metal failure surface from an adhesively bonded aluminum test piece. The substrate has been grit biasted with 50 p.m alumina grit prior to bond fabrication... 

Degrease with solvent Remove any surface deposits with non-metallic agents (e.g. alumina grit paper). 

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