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We will set the power at 400 watts to begin. At 650 Watts (full power) we could only reach 600C. The K2CO3 melts at 891 ~C. We will add insulation and hopefully get to 900 °C tomorrow.
I dunno what these guys are trying to achieve, but the Thermacore incident started, when Nelson Gernert - the chief researcher - added 2.5 pounds of nickel powder (200 mesh of Ni-200) into a 3 liter stainless steel Dewar. The Dewar weighed 300 pounds. It was a strong pressure vessel
with a hemispherical volume. Thermacore evacuated the nickel under vacuum for several days before adding H2 gas at 2 atmospheres (apparently there was no potassium but this detail needs to be verified). The most amazing thing happened next. The powder immediately and
spontaneously heated before external power could be added. The Dewar glowed orange (800C) and the engineers ran for cover. They did not measure it for radiation.
Superficial thermal analysis – 3 liters of H2 gas at 2 atmosphere will have a heat of combustion of 74 kilojoules when combined with oxygen (but there was no oxygen in the
Dewar). Heating a 300 lb Stainless vessel to 800C requires 21 megajoules. That is ostensibly 289 times the possible chemical energy! The Dewar was no longer safe as a pressure vessel and they junked it. The Thermacore incident was not reported for any number of legal and liability reasons, not to mention OSHA – and the project was canceled immediately.
It' important to note, that no external heat, neither some potassium carbonate had been used in original Thermacore experiment - so I don't quite understand the word "replication" in the above thread title. The REPLICATION implies the REPRODUCTION and REPEATING conditions of original experiment. From the above description is apparent, that the heating didn't START the reaction, it (luckily) QUENCHED it.
With such an attitude they could attempt to replicate it for ever.