The development of new technologies and estrategies in mining and geological
\nexploration of mineral deposits are close related to the quality of the components of the
\ndrilling tools. Drilling crowns, for instance, are built fixing hard particles (inserts) in a
\nmetallic matrix. Industrial diamonds are usefull as cutting particles impregnated in a
\nmetallic alloy having Cu, Fe, W, Co, as the major elements. In order to have an
\nexcelent performance during drilling an optimum adherence between inserts (abrasive
\nparticles) and matrix combined with the wear rate of the matrix is the challenge of
\nmaterials engineering for high quality drilling tools. Industrial diamonds are widely used
\nas cutting particles and their performance depends on operational parameters and on
\nthe quality of the diamonds (morphology, purity, size distribution,…) and their
\nadherence to matrix. According to these considerations the main parts of the drilling
\ncrown \u2013 the teeth \u2013 are sophisticated metal matrix \u2013 ceramic material manufactured by
\npowder metallurgy methods in which pressure, temperature, atmosphere and powder
\nquality have to be well controlled to achieve good results. In order to contribute to
\ndevelop best cutting parts the quality of diamonds plays a distinguished role.
\nAccordingly to these considerations an experimental method was developed to
\ncharacterise the abrasivity of diamonds crystals (natural or synthetic) for this kind of
\napplication. The test configuration is a classic three body tribosystem: counterbody,
\nabrasive (diamonds) and a rock sample which wear (loss of mass) shows how
\nefficiently the abrasive is. The method consists in measure the cutting efficiency of
\nparticles (diamonds) against a rock reference sample. The mass loss of this rock
\nsample is the parameter evaluated along the tests. Depending on diferences of mass
\nloss rate caused by diferent diamonds, these hard particles can be ranking in terms of
\nabrasivity \u2013 their capability to wear the sample. Results are presented validating the
\nexperimental method: diamonds from diferent suppliers show diferent capacity in
\nwearing the reference rock body. A microstructural characterisation of the diamonds,
\ndone by SEM, provides informations about their chemical, morphological and structural
\nquality. In conclusion this method allows to select hard particles for tribological
\napplications.<\/p>","protected":false},"excerpt":{"rendered":"
The development of new technologies and estrategies in mining and geological
\nexploration of mineral deposits are close related to the quality of the components of the
\ndrilling tools. Drilling crowns, for instance, are built fixing hard particles (inserts) in a
\nmetallic matrix. Industrial diamonds are usefull as cutting particles impregnated in a
\nmetallic alloy having Cu, Fe, W, Co, as the major elements. In order to have an
\nexcelent performance during drilling an optimum adherence between inserts (abrasive
\nparticles) and matrix combined with the wear rate of the matrix is the challenge of
\nmaterials engineering for high quality drilling tools. Industrial diamonds are widely used
\nas cutting particles and their performance depends on operational parameters and on
\nthe quality of the diamonds (morphology, purity, size distribution,…) and their
\nadherence to matrix. According to these considerations the main parts of the drilling
\ncrown \u2013 the teeth \u2013 are sophisticated metal matrix \u2013 ceramic material manufactured by
\npowder metallurgy methods in which pressure, temperature, atmosphere and powder
\nquality have to be well controlled to achieve good results. In order to contribute to
\ndevelop best cutting parts the quality of diamonds plays a distinguished role.
\nAccordingly to these considerations an experimental method was developed to
\ncharacterise the abrasivity of diamonds crystals (natural or synthetic) for this kind of
\napplication. The test configuration is a classic three body tribosystem: counterbody,
\nabrasive (diamonds) and a rock sample which wear (loss of mass) shows how
\nefficiently the abrasive is. The method consists in measure the cutting efficiency of
\nparticles (diamonds) against a rock reference sample. The mass loss of this rock
\nsample is the parameter evaluated along the tests. Depending on diferences of mass
\nloss rate caused by diferent diamonds, these hard particles can be ranking in terms of
\nabrasivity \u2013 their capability to wear the sample. Results are presented validating the
\nexperimental method: diamonds from diferent suppliers show diferent capacity in
\nwearing the reference rock body. A microstructural characterisation of the diamonds,
\ndone by SEM, provides informations about their chemical, morphological and structural
\nquality. In conclusion this method allows to select hard particles for tribological
\napplications.<\/p>","protected":false},"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_cat":[15],"product_tag":[],"class_list":{"0":"post-7082","1":"product","2":"type-product","3":"status-publish","5":"product_cat-sem-categoria","7":"first","8":"instock","9":"downloadable","10":"virtual","11":"taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/spectrum-engenharia.com\/en\/wp-json\/wp\/v2\/product\/7082","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spectrum-engenharia.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/spectrum-engenharia.com\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/spectrum-engenharia.com\/en\/wp-json\/wp\/v2\/comments?post=7082"}],"version-history":[{"count":2,"href":"https:\/\/spectrum-engenharia.com\/en\/wp-json\/wp\/v2\/product\/7082\/revisions"}],"predecessor-version":[{"id":7085,"href":"https:\/\/spectrum-engenharia.com\/en\/wp-json\/wp\/v2\/product\/7082\/revisions\/7085"}],"wp:attachment":[{"href":"https:\/\/spectrum-engenharia.com\/en\/wp-json\/wp\/v2\/media?parent=7082"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/spectrum-engenharia.com\/en\/wp-json\/wp\/v2\/product_cat?post=7082"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/spectrum-engenharia.com\/en\/wp-json\/wp\/v2\/product_tag?post=7082"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}