项目名称: 采用同步辐射研究极高非静水压下材料强度对压力标定的影响
项目编号: No.U1332104
项目类型: 联合基金项目
立项/批准年度: 2014
项目学科: 数理科学和化学
项目作者: 彭放
作者单位: 四川大学
项目金额: 66万元
中文摘要: 项目运用同步辐射对在极高压下压力的准确标定开展研究。压力的准确标定是高压科学与技术领域中长期存在的一个基础性难题。我们将采用金刚石压砧同步辐射径向、轴向X射线衍射高压原位技术,对压标物质和样品物质高压下的力学性质,如体弹模量、切变模量、杨氏模量及屈服强度等进行准确测量。在此基础上对不同力学特性的样品物质对压标物质标定压力值的影响开展研究,着重研究高压腔中等应力传递和等应变传递的形成机理和相互关系。通过研究,对压标物质标压受样品物质影响的诸多因数进行评估,提出运用压标物质准确标压的最佳方法。若这一基础性问题获得解决,将是高压科学和技术领域的一个重要成果,对推动高压技术的发展具有深远的意义,并将深刻地影响到与该领域有密切联系凝聚态物理、化学、新材料、地球科学、行星科学、生物医学以及国防、新能源等领域。
中文关键词: 高压;同步辐射光源;压力标定;材料强度;x 射线衍射
英文摘要: This project aims to the foundational and long-standing problem about accurate pressure calibration in high pressure science and technology.First,the mechanics properties of some pressure calibration materials and sample materials,such as bulk modulus,shear modulus,Yang’s modulus and yield strength,will be investigeted using in situ high pressure technology with diamond anvil cell and synchotron radiation X-ray radial and axial diffration. We will investegete that the sample materials with different mechanices properties influence accurate pressure calibration of pressure marker.The mechanism and relationship between isostress transmission and isostrain transimission also will be investegeted.Final,the sample materials affecting pressure calibration will be evaluated, and we will propose the method of accurate pressure calibration.If the project is perfomed, It will promote the development of high pressure science and technology and affects the relative fields,such as condensed matter physics,Chemistry, materials science,earth science, planetary science.
英文关键词: high pressure;synchrotron radiation;pressure calibration;materials strength;x-ray diffraction