kiripaka abrasive-stone

The work presents the possibility of fabricating materials for use as a matrix in sintered metallic-diamond tools with increased mechanical properties and abrasion wear resistance. In this study, the effect of micro-sized SiC, Al2O3, and ZrO2 additives on the wear behaviour of dispersion-strengthened metal-matrix composites was investigated. The development of metal-matrix composites (based on Fe–Mn–Cu–Sn–C) reinforced with micro-sized particles is a new approach to the substitution of critical raw materials commonly used for the matrix in sintered diamond-impregnated tools used for the machining of abrasive stone and concrete. The composites were prepared using spark plasma sintering (SPS). Apparent density, microstructural features, phase composition, Young’s modulus, hardness, and abrasion wear resistance were determined. An increase in the hardness and wear resistance of the dispersion-strengthened composites as compared to the base material (Fe–Mn–Cu–Sn–C) and the commercial alloy Co-20% WC provides metallic-diamond tools with high-performance properties.

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Percussive-Abrasive Stone Tools from Chagyrskaya Cave: Results of Functional Analysis

Archaeology Ethnology and Anthropology of Eurasia ◽

10.17746/1563-0110.2021.49.2.023-031 ◽

2021 ◽

Vol 49 (2) ◽

pp. 23-31

Author(s):

M. V. Seletsky ◽

A. Y. Fedorchenko ◽

P. V. Chistyakov ◽

S. V. Markin ◽

K. A. Kolobova

Keyword(s):

Raw Materials ◽

Stone Tools ◽

Lithic Assemblage ◽

Wear Analysis ◽

Use Wear ◽

Experimental Use ◽

Abrasive Stone ◽

Source Of Information ◽

Reference Samples ◽

Comprehensive Study

This article presents a comprehensive study of percussive-abrasive active stone tools from Chagyrskaya Cave, using experimental use-wear and statistical methods, supplemented by 3D-modeling. Experiments combined with use- wear analysis allowed us to determine the functions of these tools by comparing the working surfaces and use-wear traces in the Chagyrskaya samples with those in the reference samples. As a result, we identified 19 retouchers, four hammerstones for processing mineral raw materials, and one hammer for splitting bone, which indicates the dominance of secondary processing over primary knapping in the Chagyrskaya lithic assemblage. Using statistical analysis, we traced the differences in the dimensions of the manuports and lithics under study. These artifacts are a promising and underestimated source of information for identifying working operations associated with stone- and bone-processing; moreover, they can provide new data on the functional attribution of sites and the mobility of early hominins.

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On the Fine Finishing by the High Frequent Abrasive Stone

Transactions of the Japan Society of Mechanical Engineers ◽

10.1299/kikai1938.20.640 ◽

1954 ◽

Vol 20 (98) ◽

pp. 640-643 ◽

Cited By ~ 1

Author(s):

Susumu SIOZAKI ◽

Chozaburo KATO

Keyword(s):

Abrasive Stone

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Study the Properties of Abrasive Stone for Aluminum Grinding

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.754-755.688 ◽

2015 ◽

Vol 754-755 ◽

pp. 688-692

Author(s):

Nurul Syafiqah Hasni ◽

Noorina Hidayu Jamil ◽

Abdullah Chik ◽

Wi Wan Mohd Arif ◽

Hong Eng Seong

Keyword(s):

Hard Disk Drive ◽

Disk Drive ◽

Grinding Process ◽

Ftir Analysis ◽

Thermosetting Resin ◽

Magnetic Substrate ◽

Soft Spot ◽

Lapping Machine ◽

Abrasive Stone ◽

Grinding Stone

A doubled-sided lapping machine of grinding stone manufactured of a SiC as an abrasive, specific resin and other thermosetting resin were developed for grinding process of the substrate of hard disk drive (HDD) made up of aluminum since the conventional lapping machine cause the serious quality problem of the magnetic substrate. However, at certain parameter during the grinding process, the abrasive stone was clogging due to the agglomeration of debris from the substrate which cause scratches on the magnetic substrates and affect its performance. The samples were classified into four parts (soft spot, border spot, hard spot, and unused spot). Characterizations of the samples were done using XRF, SEM and FTIR analysis. Based on all the above analysis, it can conclude that the porosity of the stone were not homogeneous and the percentage of Al was highest at the border spot which shows that, the area at the border spot cause the clogging to occur thus produces the hard spot that will damage the magnetic substrate during grinding process.

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