Microstructures and thermal damage mechanisms of sintered polycrystalline diamond compact annealing under ambient air and vacuum conditions

Li, Jiansheng; Yue, Wen; Wang, Chengbiao

doi:10.1016/j.ijrmhm.2015.07.024

Cited by 37 publications

(3 citation statements)

References 30 publications

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“…This causes great internal stress and destroys the diamond carcass. In addition, the oxidation of cobalt occurs in the air . It is possible to increase the heat resistance to 800 °C using diamond particles coated with boron carbide, but the coated particles cannot form diamond–diamond bonds during the sintering process.…”

Section: Results and Discussionmentioning

confidence: 99%

“…In addition, the oxidation of cobalt occurs in the air. 23 It is possible to increase the heat resistance to 800 °C using diamond particles coated with boron carbide, 24 but the coated particles cannot form diamond−diamond bonds during the sintering process. Our approach reduces the negative impact of cobalt by replacing it with an AlCo intermetallic compound or AlCo3C triple carbide, while a strong diamond frame is formed during sintering.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Nanoengineered Polycrystalline Diamond Composites with Advanced Wear Resistance and Thermal Stability

Khabashesku

Филоненко

Баграмов

et al. 2021

ACS Appl. Mater. Interfaces

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Fluorinated grains of micrometer size diamonds overcoated with nanodiamond particles were used as a feedstock for high-pressure, high-temperature synthesis of new polycrystalline diamond composites (PDCs). Such a nanoengineering approach for exploring the interfacial chemistry of diamonds has been implemented in two methods: (i) infiltration of Co from the WC-Co layer into a fluorinated diamond layer with added Al and (ii) sintering of fluorinated micro- and nanosize diamond homogeneous mixtures with added Al and Co. We found that unlike commercial PDCs made with a metallic Co binder for drilling tools, the binding phase in new composites comprises only intermetallic compound AlCo or ternary carbide AlCo3C. As a result, composites made from homogeneous mixtures showed greater promise for improving the thermal stability, while the two-layer experimental composites during granite turning tests have demonstrated >2 times higher wear resistance than leached commercial PDCs.

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Section: Results and Discussionmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Nanoengineered Polycrystalline Diamond Composites with Advanced Wear Resistance and Thermal Stability

Khabashesku

Филоненко

Баграмов

et al. 2021

ACS Appl. Mater. Interfaces

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show abstract

“…This is due to the large difference in the thermal expansion coefficients of the diamond Materials 2022, 15, 4936 2 of 9 and metal phases in the PDC, which causes critical local thermomechanical stresses during operation. In addition, at operating temperatures above 700 • C, the cobalt phase initiates the reverse transition of diamond into graphite [9][10][11][12], which also reduces the mechanical properties and operating performance of the tool.…”

Section: Introductionmentioning

confidence: 99%

Diamond Composites Produced from Fluorinated Mixtures of Micron-Sized and Nanodiamonds by Metal Infiltration

et al. 2022

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Improving the operating performance of superhard composites is an important and urgent task, due to a continuing industrial need. In this work, diamond composites with high wear resistance were obtained by sintering fluorinated mixtures of micron-sized diamonds with nanodiamonds at high pressures and temperatures (7–8 GPa, 1550–1700 °C). Aluminum and cobalt powders were added to the diamond mixture to activate the process. The external infiltration of nickel into the diamond layer was carried out additionally during the sintering process, and the effects of nickel infiltration on the structure and properties of composites were studied. The metal melt ensured the mass transfer of carbon within a volume, and the formation of a strong diamond framework. The composition of the additives was selected in such a way that the binding phase became ultimately composed of the intermetallic AlNixCo1−x(x ≤ 1). The Young’s modulus of composites synthesized in this way had a value of 850 GPa, and their wear resistance when turning white granite was more than twice as high as that of premium commercial PDC. The obtained results thus demonstrate that by using nickel to increase melt infiltration into diamond-based composites, the mechanical properties of Al/Co/fluorinated diamond compositions, studied previously, can be further improved.

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Approach to controllable tribological properties of sintered polycrystalline diamond compact through annealing treatment

Yue

Qin

et al. 2017

Carbon

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Microstructures and thermal damage mechanisms of sintered polycrystalline diamond compact annealing under ambient air and vacuum conditions

Cited by 37 publications

References 30 publications

Nanoengineered Polycrystalline Diamond Composites with Advanced Wear Resistance and Thermal Stability

Nanoengineered Polycrystalline Diamond Composites with Advanced Wear Resistance and Thermal Stability

Diamond Composites Produced from Fluorinated Mixtures of Micron-Sized and Nanodiamonds by Metal Infiltration

Approach to controllable tribological properties of sintered polycrystalline diamond compact through annealing treatment

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