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<p class="MsoNormal"><span style="color:#1F497D">Hello Rick, <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">At DTU Danchip we have an e-beam evaporation system in which we deposit Titanuim. We have had at least three incidents of wipes or other parts catching fire during maintenance work. I do believe
that the root cause is that Titanuim oxidizes very fast, especially when a large, fresh surface is exposed to oxygen.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">I have tried to translate our safety precautions from Danish into some sort of English:
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">“Before the work is started, DI water is filled in a bucket and placed next to the machine. Surface cleaning of various chamber parts must take place over the water bucket. All used cloths, with
or without Ethanol/IPA are also to be deposited in the bucket, so they can absorb water.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">Absorption of water in the cloths will prevent ignition. Some metals, like Titanum, when exposed to mechanical stress like hammering or scraping, form small particles which ignite as a result of
fast oxidation”<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">Hope this could help.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">Best regards, <o:p>
</o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">Leif</span><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> labnetwork-bounces@mtl.mit.edu [mailto:labnetwork-bounces@mtl.mit.edu]
<b>On Behalf Of </b>Morrison, Richard H., Jr.<br>
<b>Sent:</b> 6. maj 2013 15:50<br>
<b>To:</b> labnetwork@mtl.mit.edu<br>
<b>Subject:</b> [labnetwork] Titanium hazard<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">Hi Everyone,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Last week one of the staff was wiping off some evaporator parts that were covered with Titanium metal. He was using texwipes soaked with IPA. He tossed the texwipes in the trash then accidentally dropped some wipes saturated
with IPA on top of them and a fire started. It self extinguished after 1 minute but it melted the bottom of a plastic trash can.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Have any of you had that happen or something similar? Needless to say this is very alarming and I need to understand what could have caused this and develop a corrective action plan.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Rick<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Draper Laboratory<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Group Leader Microfabrication Operations<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">555 Technology Square<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Cambridge Ma, 02139-3563<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><a href="http://www.draper.com">www.draper.com</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><a href="mailto:rmorrison@draper.com">rmorrison@draper.com</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">W 617-258-3420<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">C 508-930-3461<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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