Polycrystalline diamond compact with enhanced thermal stability

Liu, Shiqi; Han, Lei; Zou, Yongtao; Zhu, Pinwen; Лиу, Баочанг

doi:10.1016/j.jmst.2017.03.014

Cited by 55 publications

(5 citation statements)

References 17 publications

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“…diamond grain size and binder volume) it is possible to enhance the performance for a specific application. Previous research [8], [9] reported that cobalt binders in PCD affect PCD structure in condition of thermal and mechanical instability. Since cobalt acts both as a binder and as a catalyst in the synthesis process, during drilling at high temperature conditions, cobalt can promote allotropic conversion of diamond into graphite conveying PCD structures poor thermal stability and abrasive resistance [10].…”

Section: Introductionmentioning

confidence: 96%

Microhardness and wear behaviour of polycrystalline diamond after warm laser shock processing with and without coating

Pacella

John

Dolatabadi

et al. 2019

International Journal of Refractory Metals and Hard Materials

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Cutting tools made of ultra-hard materials such as polycrystalline diamonds offer superior wear resistance in precision machining of Aluminium alloys. However, the wear properties of these materials are dependent on their microstructural characteristics such as grain size and binder percentage. In this context, the present paper evaluates the effects of two low-energy fibre laser processes (nanosecond pulse duration) on microstructural changes of polycrystalline diamond composites and consequently investigates wear and friction characteristics and micro hardness properties. Pockets were first achieved using a single mode SPI pulsed fibre laser (1064 nm wavelength) inducing both laser shock processing (LSP) and laser peening without coating (LPwC) and characterised using a combination of scanning electron microscopy (SEM), white light interferometry, energy dispersive X-Ray (EDX) and micro hardness analyses. The as-received and processed materials were tested on a pin-on-disc for the evaluation of their wear performance. An analytical model based on the asperities of pin and disc after wear test is proposed to predict the trend of wear performance of different laser-processed materials. LSP with vinyl and quartz at a scanning speed of 500 mm s-1 achieved a micro-hardness of 110 GPa at a depth of 632 nm. LPwC at 0.8 GW cm-2 produced hybrid microstructures which share characteristics of laser shock processing and selective laser melted structures. For laser feed speed in the region of 1000 mm s-1 , micro-indentation tests revealed an improvement of hardness from 70 GPa to 95 GPa at a depth of 670 nm for LPwC. Tribotest revealed enhanced wear performance for all laser-processed pins and reduced coefficient of friction also validated by increased material removal rate when compared to the as-received material. To the best of authors' knowledge, it is reported for the first time that an improvement of wear performance can be achieved on polycrystalline diamond through LSP and LPwC.

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Section: Introductionmentioning

confidence: 96%

Microhardness and wear behaviour of polycrystalline diamond after warm laser shock processing with and without coating

Pacella

John

Dolatabadi

et al. 2019

International Journal of Refractory Metals and Hard Materials

View full text Add to dashboard Cite

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“…The major reason for the poor thermal stability of PCD is due to the existence of metal sintering aids such as Fe, Ni, Co, and Cr. Co is one of the most common metal sintering aids in the synthesis of PCD; however, Co also acts as a catalyst for the conversion of diamond to graphite [14]. Owing to the catalytic effect of Co, which leads to the reduction of its thermal stability, the graphitization temperature of PCD decreases to 700 • C, which seriously affects the lifetime of PCD at high-temperature conditions [15,16].…”

Section: Introductionmentioning

confidence: 99%

“…The high melting point of the product, silicon carbide, ensures adaptability to high-temperature environments. Liu et al [14] investigated a new triple-layer structure of polycrystalline diamond compact (PDC), in which WC/Co cemented carbide was used as the substrate, diamond-SiC-Co composite as the intermediate layer, and diamond-SiC composite as the working layer. The Co in the substrate was prevented from penetrating into the working layer, which enhanced the thermal stability, and it was shown that the initial oxidation temperature of the triplelayer structure PDC was increased by 40 • C compared to that of the conventional PDC (~780 • C).…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Carbide Particle-Toughened Si–B System of High Thermostability Polycrystalline Diamond by HPHT Sintering

Zhu

2023

Materials

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In this research, we report the synthesis of Si–TmC–B/PCD composites using Si, B, and transition metal carbide particles (TmC) as binders at high pressure and high temperature (HPHT method, 5.5 GPa and 1450 °C). The microstructure, elemental distribution, phase composition, thermal stability, and mechanical properties of PCD composites were systematically investigated. The Si–B/PCD sample is thermally stable in air at 919 °C. The initial oxidation temperature of the PCD sample with ZrC particles is as high as 976 °C, and it also has a maximum flexural strength of 762.2 MPa, and the highest fracture toughness of 8.0 MPa·m1/2.

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“…What is also essential, the high brittleness of PCD can cause to the premature tool catastrophic failure [71,72]. Regardless of the presented drawbacks, PCD cutting tools are widely used because of very high abrasion resistance [73,74]. In case of Al 4xxx alloys with a high Si content and high chemical reactivity, the wear intensity increases, which demands the usage of PCD [75].…”

Section: Introductionmentioning

confidence: 99%

Study on Technological Effects of a Precise Grooving of AlSi13MgCuNi Alloy with a Novel WCCo/PCD (DDCC) Inserts

et al. 2020

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The WCCo/PCD (Diamond Dispersed Cemented Carbide—DDCC) manufactured with the use of PPS (pulse plasma sintering) are modern materials intended for cutting tools with the benefits of tungsten carbides and polycrystalline diamonds. Nevertheless, the cutting performance of DDCC materials are currently not recognized. Thus this study proposes the evaluation of technological effects of a precise groove turning process of hard-to-cut AlSi13MgCuNi alloy with DDCC tools. The conducted studies involved the measurements of machined surface topographies after grooving with different cutting parameters. In addition, the tool life and wear tests of DDCC inserts were conducted during grooving process and the obtained results were compiled with values reached during machining with cemented carbide tools. It was also proved that grooving of AlSi13MgCuNi alloy with DDCC inserts enables 5 times longer tool life and almost 3-fold increase of cutting path compared to values obtained during grooving with H3 and H10 cemented carbide inserts. Ultimately, the feed value of f = 0.15 mm/rev and cutting speed in a range of 800 m/min ≤ vc ≤ 1000 m/min during grooving with DDCC inserts can be defined as an optimal machining parameters, enabling the maximization of tool life and improvement in surface quality.

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Polycrystalline diamond compact with enhanced thermal stability

Cited by 55 publications

References 17 publications

Microhardness and wear behaviour of polycrystalline diamond after warm laser shock processing with and without coating

Microhardness and wear behaviour of polycrystalline diamond after warm laser shock processing with and without coating

Preparation and Characterization of Carbide Particle-Toughened Si–B System of High Thermostability Polycrystalline Diamond by HPHT Sintering

Study on Technological Effects of a Precise Grooving of AlSi13MgCuNi Alloy with a Novel WCCo/PCD (DDCC) Inserts

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