文章信息/Info

Title:

Effect of Diamond Particle Size on Microstructure and Properties of Polycrystalline Diamond Compact

文章編號:

1674-3962(2025)03-0295-08

作者:

高中堂; 李雨燕; 彭臘梅; 豐德友; 王斌奇; 高志明; 張傳偉; 于源

1. 西安科技大學機械工程學院，陜西 西安 710054 2. 陜西太合智能鉆探有限公司，陜西 西安 712000 3. 中國科學院蘭州化學物理研究所 固體潤滑國家重點實驗室，甘肅 蘭州 730000

Author(s):

GAO Zhongtang; LI Yuyan; PENG Lamei; FENG Deyou; WANG Binqi;  GAO Zhiming; ZHANG Chuanwei; YU Yuan

1. College of Mechanical Engineering, Xi’an University of Science and Technology, Xi’an 710054, China 2. Shaanxi Taihe Intelligent Drilling Co., Ltd., Xi’an 712000, China et al.

關(guān)鍵詞:

金剛石粒徑; 聚晶金剛石復(fù)合片; 磨耗比; 熱穩(wěn)定性; 沖擊韌性

Keywords:

size of diamond;  polycrystalline diamond compacts;  wear ratio;  thermal stability;  impact toughness

分類號:

TQ163;TB332

DOI:

10.7502/j.issn.1674-3962.202311007

文獻標志碼:

A

摘要:

聚晶金剛石復(fù)合片（PDC）性能與金剛石粒徑大小、金剛石顆粒的分散均勻性以及Co粘結(jié)劑在金剛石顆粒之間的分布狀態(tài)密切關(guān)。采用高溫高壓燒結(jié)制備金剛石粒徑分別為3，10，16和25 μm的PDC，通過X射線衍射儀、掃描電子顯微鏡、同步熱分析儀、高速摩擦磨損實驗和抗沖擊實驗，研究了不同金剛石粒徑的PDC的物相組成、顯微組織、熱穩(wěn)定性、摩擦系數(shù)和抗沖擊韌性。結(jié)果表明，不同金剛石粒徑的PDC的最強的衍射峰分別對應(yīng)于金剛石(111)、(220)、(311)晶面，且僅在金剛石粒徑為25 μm的PDC中發(fā)現(xiàn)Co3O4相；金剛石粒徑為3，10，16和25 μm的PDC微觀組織中Co粘結(jié)劑分別以微粒、“球狀”和“孤島狀”、“葉脈狀”和“孤島狀”、“葉脈狀”分布；金剛石粒徑為25 μm的PDC摩擦系數(shù)最小，為0��049。性能測試結(jié)果表明，粒徑為10 μm的PDC性能表現(xiàn)最佳，磨耗比達到了2��04×106，抗沖擊韌性為400 J，耐熱溫度達到了744 ℃。

Abstract:

The performance of polycrystalline diamond composite sheet (PDC) is closely related to the diamond particle size, the dispersion uniformity of diamond particles and the distribution state of Co binder among diamond particles. PDC with diamond particle size of 3, 10, 16 and 25 μm were prepared by sintering at high temperature and high pressure. The phase composition, microstructure, thermal stability, friction coefficient and impact toughness of PDC with different diamond particle size were studied by X-ray diffractometer, scanning electron microscope, synchronous thermal analyzer, high-speed friction and wear test and impact resistance test. The results show that the strongest diffraction peaks of PDC prepared with different particle sizes are (111), (220), and (311). Moreover, the Co3O4 phase is found in the PDC with a diamond particle size of 25 μm. The Co binder of PDC with diamond particle sizes of 3, 10, 16 and 25 μm are distributed in the forms of fine particles, spherical and isolated shapes, vein-like and isolated shapes, and vein-like shapes, respectively. The PDC with a diamond particle size of 25 μm has the smallest friction coefficient, which is 0.049. The performance test results show that the PDC with particle size of 10 μm has the best performance, the wear ratio reaches 2.04×106, the impact toughness is 400 J, and the heat resistance temperature reaches 744 ℃.