Sökning: "electroless nickel"

Hittade 5 uppsatser innehållade orden electroless nickel.

  1. 1. Sliding wear performance of electroplated hard chromium and autocatalytic nickel-phosphorus coatings at elevated temperatures

    Master-uppsats, Karlstads universitet/Avdelningen för maskin- och materialteknik

    Författare :Mats Eriksson; [2014]
    Nyckelord :Tribology; sliding wear; hard chrome; electroless nickel;

    Sammanfattning : This thesis was written for a Swedish valve manufacturer to find out in what temperature regimes it was possible to replace electroplated hard chromium with autocatalytic electroless nickel-phosphorus. In this work the dry sliding wear properties of electroplated hard chromium and autocatalytic electroless nickel-phosphorus(10% P) were compared. LÄS MER

  3. 2. Alcoholate corrosion of aluminium in ethanol blends -the effects of water content, surface treatments, temperature, time and pressure

    Uppsats för yrkesexamina på avancerad nivå, KTH/Skolan för kemivetenskap (CHE)

    Författare :Jenny Linder; [2012]
    Nyckelord :Alcoholate corrosion; aluminium; ethanol; dry corrosion; surface treatments;

    Sammanfattning : As it becomes more important to replace fossil fuels with alternative fuels, biofuels like ethanol are becoming more commercially used. The increased use of ethanol brings good influences such as lower impact on the environment. However, the use of ethanol can also bring negative effects regarding corrosion of metals. LÄS MER

  4. 3. Mechanical Reliability of Aged Lead-­Free Solders

    Kandidat-uppsats, KTH/Materialvetenskap

    Författare :Susanne Lewin; [2012]
    Nyckelord :Solder Joints; Lead-free; Mechanical Reliability;

    Sammanfattning : The usage of lead-­free solder joints in electronic packaging is of greatest concern to the electronic industry due to the health and environmental hazards arising with the use of lead. As a consequence, lead is legally prohibited in the European Union and the industry is aiming to produce lead-free products. LÄS MER

  5. 4. Novel Process and Manufactur of Multi crystalline Solar Cell

    Master-uppsats, Institutionen för teknik och naturvetenskap

    Författare :Sreenivasulu Bolisetty; [2009]
    Nyckelord :inkjet; electroless plating; laser etching; multicrystalline solar cell;

    Sammanfattning : Patterning of multi crystalline silicon Solar cell is prepared with photolithography etching. Electroless plating is used to get metallization of Nickel contacts. SEM analysis of Nickel deposition and measurement of contact resistance for series and shunt resistance is done. LÄS MER

  7. 5. Implementation of Lead-Free Soldering in Highly Reliable Applications

    Magister-uppsats, Institutionen för teknik och naturvetenskap

    Författare :Ove Berglund; [2007]
    Nyckelord :RoHS; Lead-free; Reliability; Solder; Whiskers; Voids; Saab Systems;

    Sammanfattning : The directive of the European parliament and of the council on the Restriction of the use of certain Hazardous Substances (RoHS) in Electrical and Electronic Equipment (EEE) took effect in the European Union on July 1, 2006. Japan, California, China and Korea are all closed markets for exporters of components containing lead from July 1, 2007. LÄS MER