Standard Uncertainty of a Measurement

Ratcliffe, Colin P.; Ratcliffe, Bridget

doi:10.1007/978-3-319-12063-8_3

Cited by 1 publication

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“…The standard uncertainty ( k = 1) of the temperature is 1 °C. When we assume that the elastic modulus and shear modulus were modeled by a uniform probability distribution of lower limit and upper limit, the standard uncertainties ( k = 1) to be associated with the elastic modulus and shear modulus were the positive square root of the variance of the distribution …”

Section: Experimental Methodsmentioning

confidence: 99%

“…The standard uncertainty ( k = 1) of the temperature is 0.577 °C. When we assumed the thermal diffusivity was modeled by a uniform probability distribution of lower limit and upper limit, the standard uncertainty ( k = 1) to be associated with the thermal diffusivity was the positive square root of the variance of the distribution . For the thermal diffusivity of Ti55/7 vol %TiBw, the standard uncertainties range from 0.12 × 10 –6 to 0.14 × 10 –6 m 2 ·s –1 in the temperature ranging from 50 to 350 °C, the standard uncertainties range from 0.14 × 10 –6 to 0.17 × 10 –6 m 2 ·s –1 in the temperature ranging from 350 to 700 °C, and the standard uncertainties range from 0.17 × 10 –6 to 0.22 × 10 –6 m 2 ·s –1 in the temperature ranging from 700 to 1100 °C.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…The density was measured three times for every material, and the average value of the densities was used as the density of the corresponding material. On the basis of the standard deviation of the mean of the three measured densities for the three materials, the standard uncertainty ( k = 1) of the density at room temperature was 3.333 × 10 –4 g·cm –3 .…”

Section: Experimental Methodsmentioning

confidence: 99%

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Thermophysical Properties of Ti55 and Ti55/TiBw Composites

Xie

et al. 2022

J. Chem. Eng. Data

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The thermophysical properties of materials not only have important theoretical significance for research, but they also play an important role in engineering technology. Taking the Ti55, Ti55/3.5 vol %TiBw, and Ti55/7 vol %TiBw composites as the experimental materials, the thermal expansion coefficient, density, elastic modulus, shear modulus, Poisson's ratio, specific heat, thermal diffusivity and thermal conductivity at high temperature were measured or calculated. The experimental results revealed the influence of TiB whisker (TiBw) on the thermophysical properties of the material. The high TiBw content contributed to increase the density, elastic modulus, and shear modulus of the composites, and the models for elastic modulus and shear modulus showed good agreement with the experimental data. Moreover, although there were small differences in specific heat, thermal diffusivity, and thermal conductivity between the three materials, the specific heat, thermal diffusivity, and thermal conductivity of the composites were larger for a temperature below 700 °C. Additionally, TiBw had a negative effect on Poisson's ratio and the thermal expansion coefficient of the composites, while the influence of TiBw content on the thermal expansion coefficient of the composites gradually decreased with increasing temperature.

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Experimental Methodsmentioning

confidence: 99%

Section: Experimental Methodsmentioning

confidence: 99%

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