纯PCBN高压烧结行为与工艺规律

邓雯丽; 邓福铭; 张鹏; 周蕾蕾; 席沛尧; 马向东

doi:10.11858/gywlxb.20170617

纯PCBN高压烧结行为与工艺规律

doi: 10.11858/gywlxb.20170617

邓雯丽^{1, 2, 3,},
邓福铭^{1, 2, 3,*, ,},
张鹏^{1, 2, 3},
周蕾蕾^{1, 2, 3},
席沛尧^{1, 2, 3},
马向东^{1, 2}

1.
中国矿业大学(北京)超硬刀具材料研究所, 北京 100083
2.
中国矿业大学(北京)高压新材料研发中心, 北京 100083
3.
焦作天宝桓祥机械科技有限公司, 河南焦作 454150

基金项目:

高等学校博士学科点专项科研基金 20120023110016

北京市自然科学基金与北京市科学技术研究院联合基金 L150012

国家自然科学基金 51172278

详细信息

作者简介:
邓雯丽(1990—),女,博士研究生,主要从事聚晶立方氮化硼超硬复合材料研究.E-mail:393454753@qq.com

通讯作者:
邓福铭(1963—), 男, 博士, 教授, 主要从事金刚石、立方氮化硼及其他超硬复合材料研究.E-mail:dfm@cumtb.edu.cn

中图分类号: O521.2;O521.9;TG74
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出版历程
- 收稿日期: 2017-07-17
- 修回日期: 2017-07-23

Sintering Behavior and Technical Rule of Pure PCBN Synthesized under High Pressure

DENG Wenli^{1, 2, 3
,},
DENG Fuming^{1, 2, 3,*
, ,},
ZHANG Peng^{1, 2, 3},
ZHOU Leilei^{1, 2, 3},
XI Peiyao^{1, 2, 3},
MA Xiangdong^{1, 2}

1.
Institute of Superhard Cutting Tool Materials, China University of Mining and Technology(Beijing), Beijing 100083, China
2.
Research Center of High Pressure Materials, China University of Mining and Technology(Beijing), Beijing 100083, China
3.
Jiaozuo Tianbao Huanxiang Machinery Technology Co.Ltd., Jiaozuo 454150, China

摘要

摘要: 采用粒度为10 μm的纯cBN微粉在不同的高压烧结工艺参数(烧结压力、温度和时间)下制备了纯聚晶立方氮化硼(PCBN)烧结体。利用扫描电镜观察了PCBN烧结体的微结构, 并测试了其耐磨性和抗压强度, 进而讨论了压力、温度和烧结时间对纯PCBN烧结体性能的影响规律。结果表明:对纯PCBN烧结体性能影响最大的因素是烧结压力, 其次是烧结温度和时间; 在本实验条件下, 当压力为9 GPa、温度为1 700 ℃和烧结时间为240 s时, 高压烧结得到的纯PCBN烧结体样品性能最优, 其磨耗比为10 200, 抗压强度为2.52 GPa。
- 立方氮化硼(cBN) /
- 纯PCBN烧结体 /
- 高压高温 /
- 耐磨性 /
- 抗压强度
Abstract: In the present work, pure polycrystalline cubic boron nitride (PCBN) sintered bodies were synthesized under different high pressure sintering conditions using 10 μm-sized cBN grains.The microstructure of the sintered pure PCBN bodies were investigated using the scanning electron microscope (SEM) and X-ray diffractomer (XRD).The wear ratio and compressive strength of the sintered pure PCBN bodies were tested, and the effects of the sintering pressure, temperature and holding time on the microstructure and properties of sintered pure PCBN bodies were examined.The results show that the factors exerting the most significant influence on the properties of the sintered samples are the pressure, the sintering temperature and the holding time, in order of their degrees of influence.When they are 9 GPa, 1 700 ℃ and 240 s, respectively, the optimal properties of the pure PCBN are achieved, i.e. with the wear ratio as 10 200 and the compressive stress as 2.52 GPa.
- cubic boron nitride (cBN) /
- sintered pure PCBN body /
- high pressure and high temperature /
- wear ratio /
- compressive strength

HTML全文

图 1 不同烧结温度下所得纯PCBN烧结体的磨耗比和抗压强度

Figure 1. Wear ratio and compressive strength of sintered pure PCBN samples at different sintering temperatures

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图 2 不同烧结温度下纯PCBN烧结体的SEM形貌照片:(a) 1 500 ℃, (b) 1 700 ℃

Figure 2. SEM images of the pure PCBN sintered bodies at different temperatures:(a) 1 500 ℃, (b) 1 700 ℃

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图 3 不同烧结时间下所得纯PCBN烧结体的磨耗比和抗压强度

Figure 3. Wear ratio and compressive strength of sintered pure PCBN samples at different sintering times

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图 4 不同烧结时间下纯PCBN烧结体的SEM形貌照片:(a) 240 s, (b) 270 s

Figure 4. SEM images of the pure PCBN sintered bodies at different sintering times:(a) 240 s, (b) 270 s

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图 5 不同烧结压力下所得纯PCBN烧结体的磨耗比和抗压强度

Figure 5. Wear ratio and compressive strength of sintered pure PCBN samples at different sintering pressures

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图 6 不同烧结压力下纯PCBN烧结体的XRD图谱

Figure 6. XRD spectra of the pure PCBN sintered bodies at different sintering pressures

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表 1 纯PCBN高压烧结实验设计方案与测试结果

Table 1. Design of the sintering experiment and measurement results of sintered pure PCBN samples

No.	p/GPa	T/℃	t/s	Q	S/GPa
1	9	1 500	240	4 560	1.46
2	9	1 600	240	5 390	1.68
3	9	1 800	240	8 370	2.41
4	9	1 700	180	5 050	1.55
5	9	1 700	210	6 390	1.68
6	9	1 700	270	9 620	2.46
7	6	1 700	240	1 030	0.95
8	7	1 700	240	4 760	1.78
9	8	1 700	240	7 570	2.36
10	9	1 700	240	10 200	2.52

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