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Advanced Materials Engineering Services for the High Technology and Process Industries

Surface Analysis
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Electropolished surfaces evaluated in accordance with SEMI F19 specifications:

Auger surface analysis and depth profiles

XPS surface analysis

Chromium-to-iron ratios

Chromium oxide to iron oxide ratios

Oxide thicknesses

Surface roughness

SEM surface examination at 3,500x

SEMI Standards As Referenced: F20, F37, F60, F70, F72, F73, F77

Energy Dispersive X-Ray Analysis
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Aluminum oxide corrosion products formed during the contamination of liquid natural gas pump by sea water.

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Fractography
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Crack initiation and propagation in ceramic part.

Fused Quartz

Stainless Steels

Ceramics

Brazing
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Metallographic section through gold germanium braze between stainless steel and alumina.

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Scanning Electron Microscopy 

Corrosion of Pirani pressure sensor 
by moist bromine.

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Corrosion Testing
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Pitting of 316L stainless steel in 6% hydrated ferric chloride.  ASTM G-48 Corrosion Test.

SEMI F77(cpt), F2129

ASTM G48, G150, G61

Metallography
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Annealed copper

Preparation of metallographic cross-sections including welds, plasma coatings, ceramics, and polymers.

EDS/EDX Element Mapping

EDS element mapping shows nickel layer attacked by bromine.

EDS

EDX

Failure Analysis
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Catastrophic failure of phosphoric acid storage tanks due to chloride stress corrosion cracking.

MTA Inc has over 50 years of experience in failure analysis working with a broad range of industries involved in the design, fabrication and operation of equipment used in the manufacture of semiconductors and the production of

pharmaceuticals, and process chemicals such as ethanol, hydrogen peroxide sulfuric and phosphoric acid.

Welding
Tube weld in 316L stainless steel. X50.j

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