As the global population continues to grow,the enormous stress on our environment and resources is becoming impossible to ignore.A focus on producing and consuming as cheaply as possible has created an economy in whic...As the global population continues to grow,the enormous stress on our environment and resources is becoming impossible to ignore.A focus on producing and consuming as cheaply as possible has created an economy in which objects are briefly used and then discarded as waste,featuring a linear lifecycle that creates an enormous amount of waste.The alternative to the linear economy“take-make-waste”is called the“circular economy”.Under this paradigm,materials are recycled to build new products or components that are designed and built to promote their reuse and refurbishment.This assures the continuous(re-)exploitation of existing resources,reducing the extraction of new raw materials.However,customers often reject these reused or refurbished products under the suspicion that they do not meet the same usability,safety,or performance levels of new products.In this sense,trustworthy records of historical details of refurbished products could increase consumers’confidence in products and components of the“circular economy”,prioritizing trustworthiness,reliability,and transparency.This work presents a new certification tool based on blockchain technology to guarantee trusted,accurate,transparent,and traceable lifecycle information of products and their components and to generate trustworthy certificates to probe refurbished product historical details.This tool aims to enhance refurbished product visibility by creating the basis for making the circular economy a reality in any domain.展开更多
Diamond like carbon(DLC)coatings typically present good self-lubricating tribological properties that could be of interest in sliding dielectric contacts in multiple electrical applications.In this work electro-tribol...Diamond like carbon(DLC)coatings typically present good self-lubricating tribological properties that could be of interest in sliding dielectric contacts in multiple electrical applications.In this work electro-tribological studies have been performed on several DLC coatings against aluminum in different humidity conditions,in which the coefficients of friction(CoFs)and electrical contact resistance(ECR)were continuously monitored.Results show that CoF and ECR data can be linked to the properties of the coatings(thickness,finishing,microstructure,residual stresses,and wettability)and the degradation modes of their tribological and electrical properties.Therefore,electro-tribological data can provide valuable information about the performance of dielectric coatings,the reasons behind it,and assist in the development of the coatings.ECR also shows potential for on-line monitoring of coated parts in operation.展开更多
文摘As the global population continues to grow,the enormous stress on our environment and resources is becoming impossible to ignore.A focus on producing and consuming as cheaply as possible has created an economy in which objects are briefly used and then discarded as waste,featuring a linear lifecycle that creates an enormous amount of waste.The alternative to the linear economy“take-make-waste”is called the“circular economy”.Under this paradigm,materials are recycled to build new products or components that are designed and built to promote their reuse and refurbishment.This assures the continuous(re-)exploitation of existing resources,reducing the extraction of new raw materials.However,customers often reject these reused or refurbished products under the suspicion that they do not meet the same usability,safety,or performance levels of new products.In this sense,trustworthy records of historical details of refurbished products could increase consumers’confidence in products and components of the“circular economy”,prioritizing trustworthiness,reliability,and transparency.This work presents a new certification tool based on blockchain technology to guarantee trusted,accurate,transparent,and traceable lifecycle information of products and their components and to generate trustworthy certificates to probe refurbished product historical details.This tool aims to enhance refurbished product visibility by creating the basis for making the circular economy a reality in any domain.
文摘Diamond like carbon(DLC)coatings typically present good self-lubricating tribological properties that could be of interest in sliding dielectric contacts in multiple electrical applications.In this work electro-tribological studies have been performed on several DLC coatings against aluminum in different humidity conditions,in which the coefficients of friction(CoFs)and electrical contact resistance(ECR)were continuously monitored.Results show that CoF and ECR data can be linked to the properties of the coatings(thickness,finishing,microstructure,residual stresses,and wettability)and the degradation modes of their tribological and electrical properties.Therefore,electro-tribological data can provide valuable information about the performance of dielectric coatings,the reasons behind it,and assist in the development of the coatings.ECR also shows potential for on-line monitoring of coated parts in operation.
