Effect of basalt fiber on the microstructure and holding strength of sintered WC-based diamond composite

Chen, Chen; Liu, Xiang; Zhou, Fanqin; Ma, Yinlong; Yue-qi, LI

doi:10.1016/j.ijrmhm.2021.105600

Cited by 6 publications

(2 citation statements)

References 29 publications

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“…According to the above current results, it is determined that the comprehensive mechanical properties (Vickers hardness, flexural fracture strength, and fracture toughness) of the WM composite are more excellent under the sintering temperature of 1200 °C. Comparing with the reported reinforcements/WC composites, [7,[11][12][13]23,35,[39][40][41][42][43][44][45][46] the WM composites (1200 °C) reported here exhibit outstanding mechanical properties with relatively low sintering temperature and low content of reinforcements, as shown in Figure 7a,b, respectively. From Figure 7a, it shows that the WM composite has both higher hardness and toughness at lower sintering temperatures than other binderless WC composites.…”

Section: Mechanical Propertiessupporting

confidence: 57%

Preparation of High‐Performance WC–MgO Composites by Spark Plasma Sintering

et al. 2022

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Herein, tungsten carbide (WC)–4.3 wt% MgO composite powders are synthesized by high‐energy planetary ball milling method and then consolidated by spark plasma sintering (SPS). Submicrometer WC–MgO composite powders are consolidated to obtain a nearly complete density of WC–MgO composites (99.15%). The nanosized MgO distributed along the WC grains in WC–MgO composite plays an important role of dispersion strengthening and achieving high flexural fracture strength of WC–MgO composites (1348 MPa). As the addition of MgO increases the interfacial strength, the fracture mode of WC–MgO composites is mainly a mixture of transgranular fracture and intergranular fracture. High value on Vickers hardness (1660HV) and fracture toughness (9.37 MPa m1/2) of WC–MgO are also observed due to the crack deflection and crack bridging. Binderless WC–MgO composites have similar properties to WC–Co and are expected to replace WC–Co hard metal for saving resources and reducing cost.

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Section: Mechanical Propertiessupporting

confidence: 57%

Preparation of High‐Performance WC–MgO Composites by Spark Plasma Sintering

et al. 2022

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“…So far, there has been little research on fiber reinforcement in the field of IDBs. Some researchers have added basalt fibers as additives to the drill bit matrix and found that a small amount of basalt fiber can enhance the mechanical properties of the matrix, but it lowers the wear resistance of the composite material [ 31 , 32 ]. Potassium titanate whiskers (PTWs), a type of ultra-short fiber, are widely used in ceramic brake pads and other friction materials [ 33 , 34 , 35 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Carbon Fiber and Potassium Titanate Whisker on the Mechanical and Impact Tribological Properties of Fe-Based Impregnated Diamond Bit Matrix

Wang,

Guan,

Sun

et al. 2024

Materials

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Various contents of carbon fibers (CFs) and potassium titanate whiskers (PTWs) were added to an Fe-based impregnated diamond bit (IDB) matrix to enhance its adaptability to percussive–rotary drilling. A series of mechanical tests were conducted successively to find the effects of the reinforcing materials on the properties of the Fe-based IDB samples. Then, the fracture surfaces of the samples were analyzed via scanning electron microscopy (SEM) and energy-dispersive spectroscopy, and the worn surfaces and abrasive debris of the samples were analyzed using a laser scanning confocal microscope and SEM. The results show that both the CF and PTW can effectively improve the hardness and bending strength of an Fe-based IDB matrix, and those parameters reached their maximum values at the additive amount of 1 wt%. However, the CF had a better enhancement effect than the PTW. Furthermore, the CF improved the impact wear resistance of the IDB matrix, with a minimum wear rate of 2.38 g/min at the additive amount of 2 wt%. However, the PTW continuously weakened the impact wear resistance of the IDB matrix with increases in its content. Moreover, the morphologies of the worn surfaces indicated that the minimum roughness of the CF-reinforced IDB matrix decreased significantly to as low as 4.91 μm, which was 46.16% lower than that without CF, whereas the minimum roughness of the PTW-reinforced samples decreased by 11.31%. Meanwhile, the abrasive debris of the CF-reinforced samples was more uniform and continuous compared to that of the PTW-reinforced samples. Overall, the appropriate addition of CF or PTWs can enhance the mechanical properties of Fe-based IDB matrices, which can be used on different formations based on their impact wear resistance.

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