Sökning: "green manufacturing"

Visar resultat 16 - 20 av 50 avhandlingar innehållade orden green manufacturing.

  1. 16. Computational Modeling of Liquid-Phase based on Homogenization

    Författare :Mikael Öhman; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Computational Homogenization; Liquid Phase Sintering; FE2;

    Sammanfattning : Liquid-phase sintering is the process where a pre-compacted powder, "green body", is heated to the point where(a part of) the solid material melts, and the specimen shrinks while keeping (almost) net shape. In the case of hardmetal, the microstructure is defined by WC-Co-particles with large pores, whereby molten Co represents the liquid phase. LÄS MER

  3. 17. Surface Chemical Characteristics of Chromium-alloyed Steel Powder and the Role of Process Parameters during Sintering

    Författare :Dimitris Chasoglou; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; carbothermal reaction; sintering atmosphere; depth profiling; XPS AES; HR SEM EDX; water atomized powder; surface coverage; reduction oxidation; PM steels; sintering; Cr-Mn-spinel oxides; surface oxides;

    Sammanfattning : Powder Metallurgy (PM) is a cost efficient method suitable for sustainable production of structural parts that have strict dimensional tolerances and complex geometries. It has been a common practice to utilize Ni and Cu as alloying elements in PM steels, but the high and fluctuating prices of Ni and the concerns around it associated with health hazards as well as the difficulty in recycling Cu lead the PM industry to search for effective alternatives such as Cr and Mn. LÄS MER

  4. 18. Quantum transport in photoswitching molecules : An investigation based on ab initio calculations and Non Equilibrium Green Function theory

    Författare :Anders Odell; Anna Delin; Anders Niklasson; Jonas Fransson; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; molecular electronics; electron transport; electron structure; density functional theory; non equilibrium green function theory; Electronic structure; Elektronstruktur;

    Sammanfattning : Molecular electronics is envisioned as a possible next step in device miniaturization. It is usually taken to mean the design and manufacturing of electronic devices and applications where organic molecules work as the fundamental functioning unit. LÄS MER

  5. 19. Innovative Manufacturing Method for Gears for Heavy Vehicle Application

    Författare :Alireza Khodaee; Amir Rashid; Bengt Lindberg; Christoph Broeckmann; KTH; []
    Nyckelord :;

    Sammanfattning : The present thesis is a summary of research result on an innovative manufacturing method for production of PM gears for application in heavy vehicle. The method uses a powder metal densifications process route to ensure full density. LÄS MER

  7. 20. Unravelling the Green Packaging Dilemma : Packaging Development for Sustainable Food Supply Chains

    Författare :Katrin Molina-Besch; Förpackningslogistik; []
    Nyckelord :Food packaging; Green packaging; Packaging Development; Sustainable Food Supply Chain;

    Sammanfattning : Green packaging development (GPD) involves the process of developing packaging with minimized environmental impact. Over the last decade, the GPD perspective has evolved from a traditionally packaging material-focused one to a holistic one. LÄS MER