Enhanced tensile strength and thermal conductivity in copper diamond composites with B4C coating

Sun, Youhong; He, Linkai; Zhang, Chi; Meng, Qingnan; Лиу, Баочанг; Gao, Ke; Wen, Mao; Zheng, Weitao

doi:10.1038/s41598-017-11142-y

Cited by 44 publications

(23 citation statements)

References 36 publications

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“… where K m and K r are TC of matrix and reinforcement particles respectively (K Al = 237 W/m·K 32 , K diamond = 1350 W/m·K 7 ), a is the radius of reinforcement particle. The interfacial thermal conductance h c is identified as where ρ m and ρ r are theoretical density of matrix and reinforcement particle respectively, v m and v r are phonon velocity in matrix and reinforcement particle respectively ( v Al = 3040 m/s, = 13924 m/s 26 ), and c m is the specific heat of matrix ( C Al = 880 J/kg·K 7 ).…”

Section: Discussionmentioning

confidence: 99%

“…It is well known that air (or vacuum) is an excellent heat insulation layer. Furthermore, the influence of porosity on TC was investigated in diamond/Cu composites 26 . Therefore, the existence of gap in composite contributed to the deterioration in TC of composite, leading to a larger deviation between measured and theoretical results.…”

Section: Discussionmentioning

confidence: 99%

“…For forming boron carbide (B 4 C) coating on diamond particles, the mixture of boron (B), boric acid (H 3 BO 3 ) and diamond particles was heated in a tube furnace at 1200 for 6 h in Ar atmosphere. The method was described in detail in the previous work 26 . Different fraction of diamonds (30, 40 and 50 vt.%) were mechanically mixed with aluminum powder at room temperature.…”

Section: Methodsmentioning

confidence: 99%

“…These results indicated that Al/B 4 C exhibited a strong interface. Meanwhile, B 4 C bond with diamond via B-C covalent bond 26 . Therefore, pre-plating B 4 C coating on diamond was a potential effective method for increasing both strength and TC for diamond/Al composite.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced bending strength and thermal conductivity in diamond/Al composites with B4C coating

Sun

Zhang

et al. 2018

Sci Rep

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Diamond/Al composites containing B4C-coated and uncoated diamond particles were prepared by powder metallurgy. The microstructure, bending strength and thermal conductivity were characterized considering the B4C addition and diamond fraction. The influence of B4C coating and fraction of diamond on both bending strength and thermal conductivity were investigated. The bending strength increased with decreasing diamond fraction. Moreover, addition of B4C coating led to an obvious increase in bending strength. The peak value at 261.2 MPa was achieved in the composite with 30 vt.% B4C-coated diamond particles, which was about twice of that for 30 vt.% uncoated diamond/Al composite (140.1 MPa). The thermal conductivity enhanced with the increase in diamond fraction, and the highest value (352.7 W/m·K) was obtained in the composite with 50 vt.% B4C-coated diamond particles. Plating B4C on diamond gave rise to the enhancement in bending strength and thermal conductivity for diamond/Al composites, because of the improvement of the interfacial bonding between diamond and aluminum matrix.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhanced bending strength and thermal conductivity in diamond/Al composites with B4C coating

Sun

Zhang

et al. 2018

Sci Rep

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“…For instance, Ren's research team has committed to improving the comprehensive performance of bionic bits, such as the cutting force, anti-adhesion, and wear resistance. They have already carried out in-depth research into the design of bionic drill bits [2,4], the rock fragmentation mechanism [3], the wear behavior and mechanism under different scales [37,38], the coating materials [39], and the anti-erosion performance of a bionic unit coating [40]. For example, in the design of a bionic claw toe diamond inlay design, the front paws of a pangolin have been referenced.…”

Section: Bionic Bitsmentioning

confidence: 99%

Advances in the application of biomimetic surface engineering in the oil and gas industry

Guo

Zhang

2019

Friction

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Friction is widespread in almost every field in the oil and gas industry, and it is accompanied by huge energy losses and potential safety hazards. To deal with a series of questions in this regard, biomimetic surfaces have been developed over the past decades to significantly reduce economic losses. Presently, biomimetic surface engineering on different scales has been successfully introduced into related fields of the oil and gas industry, such as drill bits and the inner surfaces of pipes. In this review, we focused on the most recent and promising efforts reported toward the application of a biomimetic surface in oil and gas fields, indicating the necessity and importance of establishing this disciplinary study. Regarding the oil and gas industry, we mainly analyzed and summarized some important research results into the following three aspects: (i) applications in reducing the wear of exploration production equipment and its components, (ii) separation and drag release technologies in oil/gas storage and transportation, and (iii) functional coatings used in oil and gas development in oceans and polar regions. Finally, based on an in-depth analysis of the development of biomimetic surface engineering in the fields of oil and gas, some conclusions and perspectives are also discussed. It is expected that biomimetic surface engineering can be used in oil and gas fields more widely and systematically, providing important contributions to green development in the near future.

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High thermal conductive copper/diamond composites: state of the art

Jia

Yang

2020

J Mater Sci

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Copper/diamond composites have drawn lots of attention in the last few decades, due to its potential high thermal conductivity and promising applications in high-power electronic devices. However, the bottlenecks for their practical application are high manufacturing/machining cost and uncontrollable thermal performance affected by the interface characteristics, and the interface thermal conductance mechanisms are still unclear. In this paper, we reviewed the recent research works carried out on this topic, and this primarily includes (1) evaluating the commonly acknowledged principles for acquiring high thermal conductivity of copper/diamond composites that are produced by different processing methods; (2) addressing the factors that influence the thermal conductivity of copper/diamond composites; and (3) elaborating the interface thermal conductance problem to increase the understanding of thermal transferring mechanisms in the boundary area and provide necessary guidance for future designing the composite interface structure. The links between the composite’s interface thermal conductance and thermal conductivity, which are built quantitatively via the developed models, were also reviewed in the last part.

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Enhanced tensile strength and thermal conductivity in copper diamond composites with B4C coating

Cited by 44 publications

References 36 publications

Enhanced bending strength and thermal conductivity in diamond/Al composites with B4C coating

Enhanced bending strength and thermal conductivity in diamond/Al composites with B4C coating

Advances in the application of biomimetic surface engineering in the oil and gas industry

High thermal conductive copper/diamond composites: state of the art

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