<p>Despite its significance in practical applications, until today dissolutive wetting in metallic systems remains poorly understood due to the intricate liquid/solid interactions. In this study, we investigate nine metallic systems encompassing a vast range of thermodynamic behaviors. Our findings reveal three distinct wetting behaviors and identify two key thermodynamic parameters that control solid solution formation and then dissolutive wetting behaviors, namely the solubility of the substrate element in the liquid (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">${C}_{L}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mrow> <mi>C</mi> </mrow> <mrow> <mi>L</mi> </mrow> </msub> </math></EquationSource> </InlineEquation>) and the solidification composition range (<InlineEquation ID="IEq2"> <EquationSource Format="TEX">${C}_{R}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mrow> <mi>C</mi> </mrow> <mrow> <mi>R</mi> </mrow> </msub> </math></EquationSource> </InlineEquation>). We observe a slow spreading due to the step flow mechanism in systems with a relatively low <InlineEquation ID="IEq3"> <EquationSource Format="TEX">${C}_{L}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mrow> <mi>C</mi> </mrow> <mrow> <mi>L</mi> </mrow> </msub> </math></EquationSource> </InlineEquation> and narrow <InlineEquation ID="IEq4"> <EquationSource Format="TEX">${C}_{R}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mrow> <mi>C</mi> </mrow> <mrow> <mi>R</mi> </mrow> </msub> </math></EquationSource> </InlineEquation>. For systems with high <InlineEquation ID="IEq5"> <EquationSource Format="TEX">${C}_{L}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mrow> <mi>C</mi> </mrow> <mrow> <mi>L</mi> </mrow> </msub> </math></EquationSource> </InlineEquation>, the spreading begins relatively fast and transitions to the step flow mechanism when <InlineEquation ID="IEq6"> <EquationSource Format="TEX">${C}_{L}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mrow> <mi>C</mi> </mrow> <mrow> <mi>L</mi> </mrow> </msub> </math></EquationSource> </InlineEquation> is reached. Systems with a large <InlineEquation ID="IEq7"> <EquationSource Format="TEX">${C}_{R}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mrow> <mi>C</mi> </mrow> <mrow> <mi>R</mi> </mrow> </msub> </math></EquationSource> </InlineEquation>, conversely, exhibit consistently fast spreading. Density functional theory (DFT) calculations provide deeper insights into the underlying atomistic mechanisms affecting the solid solution formation. Our results offer inspiration for optimizing high-temperature processing techniques, such as welding, coating and high temperature infiltrating.</p>

Thermodynamic framework for assessing dissolutive wetting behaviors in metallic systems

期刊论文
出版模式：

开放获取
发表日期：

2025年12月3日

查看全文

Youqing Sun,
Shoufeng Yang,
Xinghong Cai,
Zhongfu Cheng,
Wantong Chen,
Nele Moelans,
Muxing Guo,
David Seveno

摘要

Despite its significance in practical applications, until today dissolutive wetting in metallic systems remains poorly understood due to the intricate liquid/solid interactions. In this study, we investigate nine metallic systems encompassing a vast range of thermodynamic behaviors. Our findings reveal three distinct wetting behaviors and identify two key thermodynamic parameters that control solid solution formation and then dissolutive wetting behaviors, namely the solubility of the substrate element in the liquid ( ${C}_{L}$ $C_{L}$ ) and the solidification composition range ( ${C}_{R}$ $C_{R}$ ). We observe a slow spreading due to the step flow mechanism in systems with a relatively low ${C}_{L}$ $C_{L}$ and narrow ${C}_{R}$ $C_{R}$ . For systems with high ${C}_{L}$ $C_{L}$ , the spreading begins relatively fast and transitions to the step flow mechanism when ${C}_{L}$ $C_{L}$ is reached. Systems with a large ${C}_{R}$ $C_{R}$ , conversely, exhibit consistently fast spreading. Density functional theory (DFT) calculations provide deeper insights into the underlying atomistic mechanisms affecting the solid solution formation. Our results offer inspiration for optimizing high-temperature processing techniques, such as welding, coating and high temperature infiltrating.