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GB/T 41079.3-2024: Test methods for physical properties of liquid metals - Part 3: Determination of viscosity
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| GB/T 41079.3-2024 | English | 189 |
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Test methods for physical properties of liquid metals - Part 3: Determination of viscosity
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GB/T 41079.3-2024
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Basic data | Standard ID | GB/T 41079.3-2024 (GB/T41079.3-2024) | | Description (Translated English) | Test methods for physical properties of liquid metals - Part 3: Determination of viscosity | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H21 | | Classification of International Standard | 77.040.99 | | Word Count Estimation | 9,992 | | Date of Issue | 2024-10-26 | | Date of Implementation | 2025-05-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 41079.3-2024: Test methods for physical properties of liquid metals - Part 3: Determination of viscosity
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT41079.3-2024
ICS 77.040.99
CCSH21
National Standard of the People's Republic of China
Determination method of physical properties of liquid metal
Part 3.Determination of viscosity
Released on October 26, 2024
Implementation on May 1, 2025
State Administration for Market Regulation
The National Standardization Administration issued
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document is Part 3 of GB/T 41079 “Methods for determination of physical properties of liquid metals”. GB/T 41079 has been published as follows
part.
--- Part 1.Determination of density;
--- Part 2.Determination of electrical conductivity;
--- Part 3.Determination of viscosity.
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document is proposed by China Nonferrous Metals Industry Association.
This document is under the jurisdiction of the National Technical Committee on Standardization of Nonferrous Metals (SAC/TC243).
This document was drafted by. Yunnan Kewei Liquid Metal Valley R&D Co., Ltd., Technical Institute of Physics and Chemistry of the Chinese Academy of Sciences, Yunnan Zhongxuan Liquid Metal
Metal Technology Co., Ltd., Beijing Academy of Science and Technology Analysis and Testing Institute (Beijing Physical and Chemical Analysis and Testing Center), Kunming University of Science and Technology
Institute of Science, NETZSCH Scientific Instrument Trading (Shanghai) Co., Ltd., Yunnan Academy of Science and Technology, Yunnan Product Quality Supervision and Inspection Institute.
The main drafters of this document are. Chen Daotong, Deng Zhongshan, Cai Changli, Zhang Xuezhong, Cui Yuntao, Liu Jing, Zou Tao, Hu Jin, Chen Yudi, Zhao Jin, Lin Chunxia,
Liu Wenlong, Xu Liang, Liu Ping, Yang Zejun, Zhu Jiajun, Zhou Ying, Wang Kaizhao, Bai Fan, and Su Haitao.
introduction
Liquid metal is a large class of alloy materials that is liquid at room temperature or in working state. It has a wide liquid temperature range, high thermal conductivity and strong electrical conductivity.
Due to the special physical and chemical properties of liquid metal, it can be widely used in thermal control and energy, printed electronics, biomedicine, flexible machinery and other fields.
The current methods and standards for measuring the physical properties of metal materials or liquids are not applicable to the measurement of the physical properties of liquid metals.
The purpose of the "Methods for Determination of Physical Properties of Liquid Metals" is to establish a set of method standards for the determination of physical properties parameters to meet the production requirements of liquid metal products.
and trade needs.
According to the current application requirements of liquid metal in various fields and the technical independence between the measurement methods of various physical properties of liquid metal,
GB/T 41079 establishes eight commonly used key performance measurement methods, which are intended to consist of eight parts.
--- Part 1.Determination of density. The purpose is to establish a method for the determination of the density of liquid metals.
--- Part 2.Determination of electrical conductivity. The purpose is to establish a method for the determination of the electrical conductivity of liquid metals.
--- Part 3.Determination of viscosity. The purpose is to establish a method for the determination of the viscosity of liquid metals.
--- Part 4.Determination of thermal conductivity and thermal diffusivity. The purpose is to establish the thermal conductivity and thermal diffusivity of liquid metals.
Determination method.
--- Part 5.Determination of coefficient of thermal expansion. The purpose is to establish a method for the determination of the coefficient of thermal expansion of liquid metals.
--- Part 6.Determination of specific heat capacity. The purpose is to establish a method for the determination of the specific heat capacity of liquid metals.
--- Part 7.Determination of surface tension. The purpose is to establish a method for the determination of the surface tension of liquid metals.
--- Part 8.Determination of contact angle. The purpose is to establish a method for determining the contact angle of liquid metal.
Flow and deformation characteristics are the basis of many unique applications of liquid metals, and viscosity is an important parameter to characterize its rheological properties.
There are many methods for measuring metal viscosity, such as capillary method, oscillating container method, rotation method and oscillating plate method, but there are differences between the experimental values of different methods.
The principle of other methods except the rotation method is based on the assumption that the sample to be tested is a Newtonian fluid. However, in actual production applications,
During the process, the liquid metal has significant non-Newtonian fluid properties due to the inevitable presence of an oxide layer on the surface.
The apparent viscosity of liquid metal is measured by rotation method.
Determination method of physical properties of liquid metal
Part 3.Determination of viscosity
1 Scope
This document describes a method for determining the apparent viscosity of liquid metals using the single-cylinder coaxial cylinder rotation method.
This document is applicable to the determination of apparent viscosity of liquid metals in the range of room temperature to.200°C. The temperature range depends on the instrument used.
to expand.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 8170 Rules for rounding off values and expression and determination of limit values
ISO 3219-1.2021 Rheology—Part 1.Terms and symbols for rotational and oscillatory rheological measurements
ISO 3219-2.2021 Rheology - Part 2.General principles of rotational and oscillatory rheological measurements
3 Terms and Definitions
For the purposes of this document, the terms and definitions defined in ISO 3219-1.2021 and the following apply.
3.1
shear strain
Sample deformation rate caused by tangential displacement.
Note. Dimensionless.
3.2
shear rate
The rate of change of shear strain with time.
Note. The unit is per second (s-1).
3.3
shear stress
The ratio of the tangential force to the shear area.
Note. The unit is Pa.
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