Hardness and thermal stability enhancement of polycrystalline diamond compact through additive hexagonal boron nitride

2018 ◽  
Vol 149 ◽  
pp. 1-5 ◽  
Author(s):  
Yinjuan Liu ◽  
Duanwei He ◽  
Zili Kou ◽  
Fangming Liu ◽  
Pei Wang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Boron Nitride ◽  
Hexagonal Boron Nitride ◽  
Polycrystalline Diamond ◽  
Stability Enhancement ◽  
Polycrystalline Diamond Compact

Polycrystalline diamond compact with enhanced thermal stability

2017 ◽  
Vol 33 (11) ◽  
pp. 1386-1391 ◽  
Author(s):  
Shiqi Liu ◽  
Lei Han ◽  
Yongtao Zou ◽  
Pinwen Zhu ◽  
Baochang Liu
Keyword(s):  
Thermal Stability ◽  
Polycrystalline Diamond ◽  
Polycrystalline Diamond Compact

scholarly journals Electrospun Silk-Boron Nitride Nanofibers with Tunable Structure and Properties

Polymers ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1093
Author(s):  
Ye Xue ◽  
Xiao Hu
Keyword(s):  
Thermal Stability ◽  
Boron Nitride ◽  
Hexagonal Boron Nitride ◽  
Environmental Research ◽  
Strong Interactions ◽  
Helical Structures ◽  
Scanning Calorimetry ◽  
Modulated Differential Scanning Calorimetry ◽  
Good Thermal Stability ◽  
Thermal Stability Of

In this study, hexagonal boron nitride (h-BN) nanosheets and Bombyx mori silk fibroin (SF) proteins were combined and electrospun into BNSF nanofibers with different ratios. It was found that the surface morphology and crosslinking density of the nanofibers can be tuned through the mixing ratios. Fourier transform infrared spectroscopy study showed that pure SF electrospun fibers were dominated by random coils and they gradually became α-helical structures with increasing h-BN nanosheet content, which indicates that the structure of the nanofiber material is tunable. Thermal stability of electrospun BNSF nanofibers were largely improved by the good thermal stability of BN, and the strong interactions between BN and SF molecules were revealed by temperature modulated differential scanning calorimetry (TMDSC). With the addition of BN, the boundary water content also decreased, which may be due to the high hydrophobicity of BN. These results indicate that silk-based BN composite nanofibers can be potentially used in biomedical fields or green environmental research.

Sonochemical Functionalization of Boron Nitride Nanomaterials

MRS Advances ◽  
2019 ◽  
Vol 5 (14-15) ◽  
pp. 709-716
Author(s):  
Haley B. Harrison ◽  
Jeffrey R. Alston
Keyword(s):  
Thermal Stability ◽  
Boron Nitride ◽  
Photoelectron Spectroscopy ◽  
Colloidal Stability ◽  
Hexagonal Boron Nitride ◽  
Boron Nitride Nanotubes ◽  
Covalent Attachment ◽  
Covalent Functionalization ◽  
X Ray ◽  
Ft Ir

AbstractBoron nitride nanotubes (BNNTs) and hexagonal boron nitride platelets (h-BNs) have received considerable attention for aerospace insulation applications due to their exceptional chemical and thermal stability. Presently, making BN nanomaterials compatible with polymer and composite matrices is challenging. Due to their inert and highly stable structure, h-BN and BNNTs are difficult to covalently functionalize. In this work, we present a novel sonochemical technique that enables covalent attachment of fluoroalkoxy substituents to the surface of BN nanomaterials in a controlled and metered process. Covalent functionalization is confirmed via colloidal stability analysis, FT-IR, and x-ray photoelectron spectroscopy (XPS).

Thermal stability of polycrystalline diamond compact sintered with boron-coated diamond particles

2020 ◽  
Vol 104 ◽  
pp. 107753 ◽  
Author(s):  
Xiaohua Sha ◽  
Wen Yue ◽  
Haichao Zhang ◽  
Wenbo Qin ◽  
Dingshun She ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Polycrystalline Diamond ◽  
Diamond Particles ◽  
Polycrystalline Diamond Compact ◽  
Thermal Stability Of

scholarly journals Surface Manipulation of Thermal-Exfoliated Hexagonal Boron Nitride with Polyaniline for Improving Thermal Stability and Fire Safety Performance of Polymeric Materials

ACS Omega ◽  
2018 ◽  
Vol 3 (11) ◽  
pp. 14942-14952 ◽  
Author(s):  
You-Ran Zhi ◽  
Bin Yu ◽  
Anthony Chun Yin Yuen ◽  
Jing Liang ◽  
Lin-Qiang Wang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Boron Nitride ◽  
Fire Safety ◽  
Hexagonal Boron Nitride ◽  
Polymeric Materials ◽  
Safety Performance

Sintering of Frustum Shaped Polycrystalline Diamond Compact at Non-Hydrostatic Pressure

2014 ◽  
Vol 665 ◽  
pp. 11-16
Author(s):  
Jian Lai Zou ◽  
Zi Li Kou ◽  
Chao Xu ◽  
Pei Wang ◽  
Shuai Yin ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Hexagonal Boron Nitride ◽  
Polycrystalline Diamond ◽  
Sem Analysis ◽  
Sintering Behavior ◽  
X Ray Diffraction ◽  
Micro Structure ◽  
X Ray ◽  
Diamond Layer ◽  
Polycrystalline Diamond Compact

This work present the study of the sintering of polycrystalline diamond compact with hyperbolic truncated cone profile using hexagonal boron nitride assembly, rather than salt mold, which is different from conventional assembly and this kind of polycrystalline diamond compact is widely used in percussion rock bits and roller cone rock bits. The well-sintered polycrystalline diamond compact without transition layer is prepared on a WC-10wt% Co substrate at temperature 1450°C for 3 min at non-hydrostatic high pressure of 5.5Gpa.Different analyzing techniques, such as X- ray diffraction, micro-Raman spectroscopy, scanning electron microscopy were applied to characterize the micro-structure, residual stress and sintering behavior. The SEM analysis indicates that diamond-diamond (D-D) direct bonding had formed in the polycrystalline diamond layer. The Raman spectroscopy shows compressive stress in the polycrystalline diamond layer is much higher than that sintered using traditional assembly.

Mechanism of the Effect of Interface Structure on the Thermal Stability of Polycrystalline Diamond Compact

2010 ◽  
Vol 44-47 ◽  
pp. 2467-2471
Author(s):  
Wen Jie Fan ◽  
Fang Liu
Keyword(s):  
Thermal Stability ◽  
Research Result ◽  
Polycrystalline Diamond ◽  
Interface Structure ◽  
Test Method ◽  
Impact Property ◽  
Wear Property ◽  
Stability Performance ◽  
Polycrystalline Diamond Compact ◽  
Thermal Stability Of

Thermal stability is an important performance parameter of polycrystalline diamond compact. This paper focuses on the research for test method of PDC thermal stability performance. With the improvement method, the thermal stability performance of PDC with five typical macroscopic interface structure such as planar structure, v-groove, u-groove, ring groove, ring claw-tooth are tested at normal temperature and after heating, With SEM, we study on its mechanism of thermal stability performance due to different macroscopic interfaces structure, analyze the reason why PDC thermal stability performance is different with the changing of PDC macroscopic interface structure. The research result shows that the temperature influenced the wear property and the anti-impact property of PDC obviously. And it has great influence on the anti-impact property. The thermal stability of the vessel-shaped interface structure is better than the flat interface structure.

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