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Polycrystalline diamond sintered body of tellurium catalyst and preparation method thereof
The invention relates to the technical field of super hard materials, in particular to a polycrystalline diamond sintered body of a tellurium catalyst and a preparation method thereof. The polycrystalline diamond sintered body is prepared by sintering raw materials containing diamond powder with the grain size being micron-sized and micron-sized tellurium powder under the high-temperature and high-pressure conditions of 6.5-12 GPa and 1800-1950 DEG C. In the polycrystalline diamond sintered body, D-D bonds are formed among diamond particles, and gaps of the diamond particles are filled with tellurium and tellurium carbide. The tellurium element belonging to oxygen group elements is adopted as the catalyst, and tellurium cannot be oxidized in the processes of mixing, pre-pressing and assembling the tellurium element and the diamond powder, so that the processes of catalyst reduction treatment and vacuum pre-sintering in the traditional metal catalyst polycrystalline diamond sintered body production process are omitted; and in the sintering process, tellurium exists in gaps of diamond particles in a liquid form, more D-D bond combination among the diamond particles can be formed, the density of D-D bonds in the diamond sintered body is increased, and therefore the mechanical property of the polycrystalline diamond sintered body is improved.
本发明涉及超硬材料技术领域，具体涉及一种碲触媒的多晶金刚石烧结体及其制备方法，由包含晶粒尺寸为微米级的金刚石粉和微米级碲粉的原料在6.5～12GPa，1800℃～1950℃的高温高压条件下烧结制成，在多晶金刚石烧结体中，金刚石颗粒之间形成D‑D键，金刚石颗粒的缝隙内填充有碲和碲的碳化物。本发明采用属氧族元素的碲元素作为触媒，与金刚石粉料进行混料，预压、组装的过程中，碲不会氧化，因此省去传统金属触媒多晶金刚石烧结体生产流程中的触媒还原处理和真空预烧结的流程；在烧结过程中，碲以液态形式存在于金刚石颗粒的缝隙间，有利于形成更多的金刚石颗粒间的D‑D键结合，增大金刚石烧结体中D‑D键的密度，从而提高多晶金刚石烧结体的力学性能。
Polycrystalline diamond sintered body of tellurium catalyst and preparation method thereof
The invention relates to the technical field of super hard materials, in particular to a polycrystalline diamond sintered body of a tellurium catalyst and a preparation method thereof. The polycrystalline diamond sintered body is prepared by sintering raw materials containing diamond powder with the grain size being micron-sized and micron-sized tellurium powder under the high-temperature and high-pressure conditions of 6.5-12 GPa and 1800-1950 DEG C. In the polycrystalline diamond sintered body, D-D bonds are formed among diamond particles, and gaps of the diamond particles are filled with tellurium and tellurium carbide. The tellurium element belonging to oxygen group elements is adopted as the catalyst, and tellurium cannot be oxidized in the processes of mixing, pre-pressing and assembling the tellurium element and the diamond powder, so that the processes of catalyst reduction treatment and vacuum pre-sintering in the traditional metal catalyst polycrystalline diamond sintered body production process are omitted; and in the sintering process, tellurium exists in gaps of diamond particles in a liquid form, more D-D bond combination among the diamond particles can be formed, the density of D-D bonds in the diamond sintered body is increased, and therefore the mechanical property of the polycrystalline diamond sintered body is improved.
本发明涉及超硬材料技术领域，具体涉及一种碲触媒的多晶金刚石烧结体及其制备方法，由包含晶粒尺寸为微米级的金刚石粉和微米级碲粉的原料在6.5～12GPa，1800℃～1950℃的高温高压条件下烧结制成，在多晶金刚石烧结体中，金刚石颗粒之间形成D‑D键，金刚石颗粒的缝隙内填充有碲和碲的碳化物。本发明采用属氧族元素的碲元素作为触媒，与金刚石粉料进行混料，预压、组装的过程中，碲不会氧化，因此省去传统金属触媒多晶金刚石烧结体生产流程中的触媒还原处理和真空预烧结的流程；在烧结过程中，碲以液态形式存在于金刚石颗粒的缝隙间，有利于形成更多的金刚石颗粒间的D‑D键结合，增大金刚石烧结体中D‑D键的密度，从而提高多晶金刚石烧结体的力学性能。
Polycrystalline diamond sintered body of tellurium catalyst and preparation method thereof
一种碲触媒的多晶金刚石烧结体及其制备方法
WANG WENDAN (author) / TANG HUIYUN (author) / CHEN TIANPENG (author) / HUANG TINGLING (author) / MEI DI (author)
2022-01-25
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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