DEVELOPMENT OF HIGH-TEMPERATURE STRAIN-GAGE BONDING MATERIALS CURABLE AT LOW TEMPERATURES

Technical Report · Mon Feb 01 04:00:00 EST 1960

OSTI ID:4826264

Rechter, H L; Bradstreet, S W

Compositions were prepared which meet the objectives for the program for development of strain-gage bonding materials curable at low temperatures. A low- temperature formulation of tubular alumina in a potassium silicate sol with suspending agent will cure to a high degree below 200 deg F if presealed with silicone between air setting and heating, and is electrically serviceable to 800 deg F. A hightemperature composition, designated formulation B52, based on the monoaluminum dihydrogen phosphate-silica mixture, but with chromic anhydride and alumina hydrate additions, cures adequately at 400 deg F or below and is usefal above the limiting service temperature of present strain-gage alloys, 1600 deg F. Both cement types display good resistance to thermal shock and repeated rapid cycling. They are also adequately strong for normal strain transmission purposes. The low-temperature cement is mechanically stronger at all temperatures. Differential thermal analyses verified curing temperatures and suggest the possibility of low-temperature vacuum curing of phosphoric acid compositions. (auth)

• Research Organization: Illinois Inst. of Tech., Chicago. Armour Research Foundation
• NSA Number: NSA-16-022591
• OSTI ID: 4826264
• Report Number(s): NAMC-ASL-1050(Pt.IV); NAVAIRMA
• Country of Publication: United States
• Language: English

Related Subjects

AIR
ALLOYS
ALUMINUM OXIDES
ALUMINUM PHOSPHATES
BONDING
CEMENTS
CHROMIUM OXIDES
DEFORMATION
EFFICIENCY
ELECTRICITY
EXPANSION
GAGES
HEAT TREATMENTS
HIGH TEMPERATURE
LOW TEMPERATURE
MECHANICAL PROPERTIES
METALS, CERAMICS, AND OTHER MATERIALS
MIXING
PHASE DIAGRAMS
PHOSPHORIC ACID
PLANNING
POTASSIUM SILICATES
PREPARATION
SALTS
SEALS
SILICON OXIDES
SILICONES
SOLUTIONS
STABILITY
SUSPENSIONS
TEMPERATURE
THERMAL ANALYSIS
THERMAL STRESSES
TUBES
VACUUM
WATER