材料科学
铌
高压
钻石
复合材料
聚晶金刚石
冶金
金刚石材料性能
微观结构
烧结
放电等离子烧结
陶瓷
微晶
工程物理
工程类
作者
Diego Pires Gurgel,Mayara Adrielly Leal de Oliveira Rodrigues,Meysam Mashhadikarimi,Lucas Barreto,Marcello Filgueira,Lukas Bichler,Uilame Umbelino Gomes
标识
DOI:10.1016/j.ijrmhm.2020.105234
摘要
In this research, the effect of adding 2.5, 5.0 and 10 wt% niobium (Nb) as a binding agent was investigated for
High Pressure-High Temperature (HPHT) sintering of polycrystalline diamond (PCD). Samples were sintered at
1750 °C and 7.7 GPa. Detailed characterization of the as-sintered materials revealed a uniform dispersion of the Nb additives in the diamond matrix and no interfacial cracking was observed. Higher concentration of binder increased tendency to intergranular failure. The formation of NbC and NbC0.84 phases after sintering was identified, indicating that some of the matrix carbon may have undergone graphitization
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