Bob Higgins: "Even these 4-10 micron scale nickel particles will sinter into a porous mass by heating at 500-700C".
Rossi uses micro particles in the 2 to 10 micron range. The nano structured surface tubercles coating will melt at lower temperatures that the sintering of the entire particle. This coat was seen to be intact in photos of these micro-particles from the TPT. On Sat, Oct 18, 2014 at 3:37 PM, Bob Cook <[email protected]> wrote: > Bob-- > > > Thanks for that clarification about the melting of small Ni particles. > Are there any compounds or alloys of Ni that would not melt or sinter below > say 1100 C? Since Rossi says he does not use Ni nano particles the fuel > may be something else containing Ni that could be exposed to the Li at 1000 > C in some reliable configuration. > > For example the following abstract suggests some possible substrates that > would hold the Ni at temperature. > > Composite nano particles of Ni-TiC and Ni-TiN were prepared by an active > plasma-metal reaction method. The structure and morphology were evaluated > by X-ray diffraction and transmission electron microscopy observations. The > morphology of the composite particles is dice-like or dumbbell-like, where > the outer sides are metallic and the inner part of the rod (or dice)-like > structure is TiC or TiN. The formation mechanism of the composite particles > is considered by analogy to the VSL mechanism. *The thermal stability of > the nanocomposite particles is vastly superior to that of the metal > particle.* The excellent catalytic property of the Ni-TiN composite > particle was confirmed when compared to the well-known Raney Ni particle > and mixed particles of Ni and TiC. > > Note the increased thermal stability. > > Bob > > > > > > --- Original Message ----- > > *From:* Bob Higgins <[email protected]> > *To:* [email protected] > *Sent:* Saturday, October 18, 2014 10:13 AM > *Subject:* Re: [Vo]: Gettering in the Lugano IH reactor > > As someone who has first hand experience working with micro-scale carbonyl > Ni powder, and treating these powders in a thermochemical reactor, I can > tell you that what you are saying about the nickel particles is 100% > wrong. Even these 4-10 micron scale nickel particles will sinter into a > porous mass by heating at 500-700C. Ni melts at 1455C and the nano-scale > features will all melt at about half of this temperature - the nanoscale > features will ball-up onto the micro-scale nickel particle to which the > feature may be attached. Any nanopowder of Ni present is melted before > 800C and becomes a larger particle - and then condenses. And Rossi > specifically says he does not use nickel nanopowder anyway. The same is > true for other free nanoparticles. By the time the IH reactor is operating > above 1000C, there are no nickel nanoparticles or nano-features of any kind > left - they are all melted into larger agglomerations. > > I don't know what your experience is with, but it is not with nickel > powder. Alumina does not store hydrogen in any significant measure. > > On Sat, Oct 18, 2014 at 10:57 AM, Bob Cook <[email protected]> > wrote: > >> Eric >> >> The Li may still be in a vapor form and the Ni in a nano size solid state >> form, both nano particles and Li atoms circulating as a hot mixed substance >> in the reactor. The Li reacts one atom at a time with the Ni lattice to >> form new species. The temperature is practically uniform because the nano >> particles quickly take on the temperature of the Li vapor or individual >> atoms. As has been suggested the Li evaporates from the alumina to feed >> the reactor and provide the necessary nuclear reactant with the Ni >> isotopes--with the exception of Ni-62 which does not react. >> >> I suggest that the Ni is in a particulate configuration since I do not >> believe the temperatures are sufficient to cause vaporization or >> degradation of the Ni nano particles. H may also circulate, but is of no >> consequence--or maybe it is if the alumina is really a hydrate to begin >> with by design. >> >> Bob Cook >> >> ----- Original Message ----- >> *From:* Eric Walker <[email protected]> >> *To:* [email protected] >> *Sent:* Saturday, October 18, 2014 8:23 AM >> *Subject:* Re: [Vo]: Gettering in the Lugano IH reactor >> >> On Sat, Oct 18, 2014 at 7:45 AM, Bob Higgins <[email protected]> >> wrote: >> >> Once the Li is a thin alloy film on the Ni particle surfaces which are >>> catalyzed to produce a LENR reaction, the Li may then be a participant in >>> the LENR in condensed matter form as opposed to being a participant in >>> vapor phase form. >>> >> >> I think you've hit upon an important question that has come up recently >> -- is a condensed matter phase needed in some form to get LENR to work? If >> not, there will have been a lot of theorizing over the years for naught. >> My working assumption now is that there is no such need, and LENR will work >> in pure gas phase systems as well, although I do think that an explanation >> should also account for LENR working in a solid state system. >> >> Eric >> >> >
