- Joined
- Mar 26, 2002
- Messages
- 3,397
Quick summary of what I found so far
RE : Heat Treating Wood---
[from a few quick reads,
some details may still be off]
Which 'wood' (bamboo included)
Which temperature
Which duration
all matter
best to experiment with one variety of wood
until you learn what works best for that wood
generally, heat/steam treatment:
rigidity is increased
strength decreased with a mass decrease
hardness is sometimes increased
All factors turn bad if temp or time exposed exceeds certain limits
absence of oxygen allows somewhat higher temps.....
so 'fire' hardening makes sense
since this removes most oxygen from the wood surroundings
100'C/212'F (water boiling point at sea-level / STEAM)
is the usually considered the 'plasticization temperature' of wood
so I'm guessing the boiling of water/sap/resins from fire treated wood
actually keeps the wood from overheating.......
[state-change (boiling) 'absorbs' heat]
over 150'C/300'F is usually too much.
Acids form
compounds break down
polymers fall apart
Very few historical sources.
Modern wood industry is doing quite a bit of detailed research
toward factory uses.
~
~~~~~~~~~~~~~~
<> THEY call me 'Dean' -FYI-FWIW-IIRC-JMO-M2C-YMMV-TIA-YW-GL-HH-HBD-IBSCUTWS-tWotBGUaDUaDUaD
<> Tips <> Baha'i Prayers Links --A--T--H--D
RE : Heat Treating Wood---
[from a few quick reads,
some details may still be off]
Which 'wood' (bamboo included)
Which temperature
Which duration
all matter
best to experiment with one variety of wood
until you learn what works best for that wood
generally, heat/steam treatment:
rigidity is increased
strength decreased with a mass decrease
hardness is sometimes increased
All factors turn bad if temp or time exposed exceeds certain limits
absence of oxygen allows somewhat higher temps.....
so 'fire' hardening makes sense
since this removes most oxygen from the wood surroundings
100'C/212'F (water boiling point at sea-level / STEAM)
is the usually considered the 'plasticization temperature' of wood
so I'm guessing the boiling of water/sap/resins from fire treated wood
actually keeps the wood from overheating.......
[state-change (boiling) 'absorbs' heat]
over 150'C/300'F is usually too much.
Acids form
compounds break down
polymers fall apart
Very few historical sources.
Modern wood industry is doing quite a bit of detailed research
toward factory uses.
~
~~~~~~~~~~~~~~
<> THEY call me 'Dean' -FYI-FWIW-IIRC-JMO-M2C-YMMV-TIA-YW-GL-HH-HBD-IBSCUTWS-tWotBGUaDUaDUaD
<> Tips <> Baha'i Prayers Links --A--T--H--D