二次加压对六面顶压腔压力发生效率和压力密封性能的影响

张佳威; 李强; 王俊普; 贺端威

doi:10.11858/gywlxb.20190703

二次加压对六面顶压腔压力发生效率和压力密封性能的影响

doi: 10.11858/gywlxb.20190703

张佳威^{1, 2,},
李强^{1, 2},
王俊普^{1, 2},
贺端威^{1, 2,*, ,}

1.
四川大学原子与分子物理研究所, 四川成都　610065
2.
四川大学高能量密度物理教育部重点实验室, 四川成都　610065

基金项目: 国家重点研发计划（2018YFA0305900）；国家自然科学基金（51472171, 11427810）

详细信息

作者简介:
张佳威（1992－），男，硕士研究生，主要从事大腔体静高压实验技术、超硬材料合成和材料的高压物性研究. E-mail: scujiaweizhang@163.com

通讯作者:
贺端威（1969－），男，博士，教授，主要从事高压物理、超硬材料、大腔体静高压技术研究. E-mail: duanweihe@scu.edu.cn

中图分类号: O521.3
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出版历程
- 收稿日期: 2019-01-04
- 修回日期: 2019-02-01

Effect of Re-Compression on the Pressure-Generation Efficiency and Pressure-Seal Capability of Large Volume Cubic Press

ZHANG Jiawei^{1, 2
,},
LI Qiang^{1, 2},
WANG Junpu^{1, 2},
HE Duanwei^{1, 2,*
, ,}

1.
Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
2.
Key Laboratory of High Energy Density Physics and Technology of Ministry of Education, Sichuan University, Chengdu 610065, China

摘要

摘要: 随着六面顶压机大腔体静高压技术的发展，复杂多变的压力加载工艺被应用于高压科学研究和材料制备，但是不同压力加载工艺对压力发生效率和压力密封性能的影响尚未被充分研究。本工作在六面顶压机高压腔体和密封边内置入电路，通过原位测量Bi、Tl、Ba和锰铜丝的电阻，标定了一次加压和二次加压两种不同压力加载工艺下外部加载与腔体压力及密封边压力的对应关系。实验分析结果表明，二次加压工艺会导致腔体和密封边的压力发生效率明显降低，同时也会降低压力密封性能最差时对应的外部加载。此研究可为高压装置和压力加载工艺的优化设计提供指导。
- 六面顶压机 /
- 二次加压 /
- 腔体压力 /
- 密封边压力 /
- 压力标定
Abstract: With the rapid development of static high-pressure technology, the complex and variable compression processes are used in high-pressure scientific research. However, the effect of compression processes on the pressure-generation efficiency and pressure-seal capability has rarely been studied. Measuring the pressure of a gasket and cell in situ is the key point to understanding the mechanism of pressure-generation and pressure-seal. In the present work, we put a circuit into the cell or gasket of the large volume cubic press, and then the pressure in the compression or re-compression process are independently measured by in situ electric resistance measurements of bismuth, thallium, barium and manganin. It has been found that when compression process was replaced by re-compression process, the pressure-generation efficiency of cell and gasket was lowered; furthermore, the press load at the worst pressure-seal capability was also lowered. The method detailed in this paper is helpful to optimize the high-pressure assembly and compression process for the large volume cubic press.
- large volume cubic press /
- re-compression /
- cell pressure /
- gasket pressure /
- pressure calibration

HTML全文

图 1 六面顶压机工作过程简化示意图

Figure 1. Schematic illustration of work process for large volume cubic press

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图 2 用于观察传压介质压缩前后流变情况的组装

Figure 2. Assembly for observing the deformation of pressure transmitting medium before and after compression

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图 3 测量密封边压力的电路及组装示意

Figure 3. Schematic illustration of circuit and assembly used for measuring gasket pressure

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图 4 测量腔体压力的电路及组装示意

Figure 4. Schematic illustration of circuit and assembly used for measurement of P_c

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图 5 一次加压工艺和二次加压工艺的压力加载曲线

Figure 5. Press load curves of compression and re-compression

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图 6 一次加压和二次加压工艺下的P_c和P_g与外部加载之间的关系

Figure 6. P_c and P_g as a function of the press load under the compressing process of compression and re-compression

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图 7 一次加压和二次加压下的ΔP与腔体压力之间的关系

Figure 7. Relation of ΔP vs. P_c under the compressing process of compression and re-compression

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表 1 利用Bi、Tl和Ba标定的腔体及密封边压力

Table 1. Pressure calibration results for cell and gasket using Bi, Tl and Ba

Calibrated material	Phase change type	Pressure/GPa	Press load/MN
			Compression (Single)				Re-compression
			Compression		Decompression		Compression		Decompression
			Cell	Gasket	Cell	Gasket	Cell	Gasket	Cell	Gasket
Bi	I–II	2.55	2.08±0.2	2.86±0.3	1.70±0.5	3.19±0.5	1.73±0.2	2.77±0.2	1.52±0.4	2.77±0.6
Tl	II–III	3.68	3.58±0.3	4.00±0.2	2.46±0.6	3.88±0.3	3.81±0.3	4.29±0.3	2.49±0.5	3.33±0.4
Ba	I–II	5.5	6.37±0.3	6.30±0.2	5.54±0.3	6.03±0.2		7.28±0.4		6.58±0.4

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