Vacuum evaporation and expansion of pure metals at high temperature: Application to titanium and zirconium

Poullain, Thomas; Bellot, Jean‐Pierre; Jourdan, Julien; Crassous, Isabelle; Jardy, Alain

doi:10.1016/j.vacuum.2022.111209

Cited by 5 publications

(1 citation statement)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Liquid aluminum alloys are subjected to a low-pressure environment primarily to remove dissolved hydrogen and other gases [10,11] or for making a finer microstructure [12]. However, low-pressure treatment of liquid aluminum alloys reduces the amounts of all the elements with higher vapor partial pressure values than aluminum [13]. Since the partial pressures of most unwanted metallic elements are above the values of the vapor partial pressure of aluminum itself, the vacuum refining process is the most direct way to remove a significant amount of these contamination components from liquid aluminum.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Impurities Evaporation Reaction Order in Aluminum Alloys by the Parametric Fitting of the Logistic Function

Mitrašinović,

Nešković,

Polavder

et al. 2024

Materials

View full text Add to dashboard Cite

Advancements in computer capabilities enable predicting process outcomes that earlier could only be assessed after post-process analyses. In aerospace and automotive industries it is important to predict parts properties before their formation from liquid alloys. In this work, the logistic function was used to predict the evaporation rates of the most detrimental impurities, if the temperature of the liquid aluminum alloy was known. Then, parameters of the logistic function were used to determine the transition points where the reaction order was changing. Samples were heated to 610 °C, 660 °C, 710 °C, and 760 °C for one hour, after which the chemical analyses were performed and evaporation rates were calculated for Cd, Hg, Pb and Zn elements. The pressure inside the encapsulated area was maintained at 0.97 kPa. Whereas parameters that define the evaporation rate increase with the temperature increase, the maximum evaporation rates were deduced from the experimental data and fitted into the logistic function. The elemental evaporation in liquid-aluminum alloys is the best defined by the logistic function, since transitions from the first to zero-order-governed evaporation reactions have nonsymmetrical evaporation rate slopes between the lowest and the highest evaporation rate point.

show abstract

Section: Introductionmentioning

confidence: 99%

Modeling of Impurities Evaporation Reaction Order in Aluminum Alloys by the Parametric Fitting of the Logistic Function

Mitrašinović,

Nešković,

Polavder

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

Photoelectrochemical Lithium Extraction from Waste Batteries

Lyu,

Zheng,

Wang

2024

ChemSusChem

View full text Add to dashboard Cite

The amount of global hybrid‐electric and all electric vehicle has increased dramatically in just five years and reached an all‐time high of over 10 million units in 2022. A good deal of waste lithium (Li)‐containing batteries from dead vehicles are invaluable unconventional resources with high usage of Li. However, the recycle of Li by green approaches is extremely inefficient and rare from waste batteries, giving rise to severe environmental pollutions and huge squandering of resources. Thus, in this mini review, we briefly summarized a green and promising route‐photoelectrochemical (PEC) technology for extracting the Li from the waste lithium‐containing batteries. This review first focuses on the critical factors of PEC performance, including light harvesting, charge‐carrier dynamics, and surface chemical reactions. Subsequently, the conventional and PEC technologies applying in the area of Li recovery processes are analyzed and discussed in depth, and the potential challenges and future perspective for rational and healthy development of PEC Li extraction are provided positively.

show abstract

Purification of Si–Ti alloys via vacuum evaporation: A thermodynamic and kinetic study of Ca impurity removal

Zhang

Lei

et al. 2023

Vacuum

View full text Add to dashboard Cite

Vacuum evaporation and expansion of pure metals at high temperature: Application to titanium and zirconium

Cited by 5 publications

References 25 publications

Modeling of Impurities Evaporation Reaction Order in Aluminum Alloys by the Parametric Fitting of the Logistic Function

Modeling of Impurities Evaporation Reaction Order in Aluminum Alloys by the Parametric Fitting of the Logistic Function

Photoelectrochemical Lithium Extraction from Waste Batteries

Purification of Si–Ti alloys via vacuum evaporation: A thermodynamic and kinetic study of Ca impurity removal

Contact Info

Product

Resources

About