CAJ | 학술논문

利用自动落球冲击试验机测试了碳纳米管增强聚晶金刚石复合片材料的抗冲击韧性，采用扫描电子显微镜观测了复合片材料的冲击断口形貌。结果表明：碳纳米管弥散地分布在聚晶金刚石颗粒之间；在碳纳米管没有团聚的情况下，添加碳纳米管能显著增强复合片材料的抗冲击韧性；当添加碳纳米管的质量分数达到5％时，聚晶金刚石复合片的抗冲击韧性大约是不添加碳纳米管复合片的9倍。碳纳米管增强聚晶金刚石复合片材料的强韧化机理为：碳纳米管改善了聚晶金刚石颗粒间的结合方式，协调了变形以及阻碍了裂纹扩展。
이용자동락구충격시험궤측시료탄납미관증강취정금강석복합편재료적항충격인성，채용소묘전자현미경관측료복합편재료적충격단구형모。결과표명：탄납미관미산지분포재취정금강석과립지간；재탄납미관몰유단취적정황하，첨가탄납미관능현저증강복합편재료적항충격인성；당첨가탄납미관적질량분수체도5％시，취정금강석복합편적항충격인성대약시불첨가탄납미관복합편적9배。탄납미관증강취정금강석복합편재료적강인화궤리위：탄납미관개선료취정금강석과립간적결합방식，협조료변형이급조애료렬문확전。
The impact toughness of polycrystalline diamond compacts reinforced by carbon nanotubes was investigated by automatic balls drop impact testing. The fracture morphology of the compacts was observed by scanned electron microscope ( SEM ) . The results of SEM indicate that carbon nanotubes are dispersed among polycrystalline diamond particles. In the case of no cluster of carbon nanotubes, the impact resistance toughness of the polycrystalline diamond compacts is increased significantly with the addition of carbon nanotubes. When the mass fraction of the added carbon nanotubes is about 5%, the impact toughness of the polycrystalline diamond compacts is approximately 9 times as much as that of the compacts without carbon nanotubes. The strengthening mechanism of the polycrystalline diamond compacts reinforced by carbon nanotubes is that the carbon nanotubes improve the intergranular bonding mode of polycrystalline diamonds, so as to coordinate the deformation and control the expansion of cracks.