Use of an organic compound for the absorption of ionizing radiation

• US 20050255598A1
• Filed: 02/23/2005
• Published: 11/17/2005
• Est. Priority Date: 02/24/2004
• Status: Abandoned Application

• Current Assignee: Snecma Moteurs
• Original Assignee: Snecma Moteurs
• Inventors: Cossard, Serge, Broutin, Eric
• Application Number:
  US11/062,787
• Publication Number:
  US 20050255598A1
• Time in Patent Office: Days
• US Class Current: 436/56
• CPC Class Codes: B22C 1/02 characterised by additives for special purposes, e.g. indicators, breakdown additives
• CPC Class Codes: B22C 9/12 Treating moulds or cores, e.g. drying, hardening
• CPC Class Codes: B22D 29/001 Removing cores
• CPC Class Codes: B22D 46/00 Controlling, supervising, not restricted to casting covered by a single main group, e.g. for safety reasons controlling or regulating in general G05
• CPC Class Codes: G01N 23/06 and measuring the absorption
• CPC Class Codes: G01N 23/083 the radiation being X-rays
• CPC Class Codes: Y10T 436/13 Tracers or tags

Abstract

Use is made of an organic compound of formula CH_nI_4-n, n being between one and three, in order to absorb ionizing radiation, preferably when its energy is greater than approximately 10 eV and more preferably still when it concerns X-rays or gamma rays. This material can be used in particular in devices for protecting from ionizing radiation and as absorbent labeling agent for radiography.

Claims

1. A process for detecting by radiography, in a cavity of a molded component resulting from the removal of a molding core, the presence of residues of said core, in which said residues are labeled by a substance which absorbs ionizing radiation, characterized in that said substance is a compound of formula CH_nI_4-n in which n is between 1 and 3.

2. The process as claimed in claim 1, characterized in that said compound is incorporated in the core before the molding.

3. The process as claimed in claim 1, characterized in that said compound is incorporated in the core residues after removal from the mold.

4. The process as claimed in either of claims 2 and 3, characterized in that said compound is introduced into pores or interstices of the core or of the residues.

5. The process as claimed in one of claims 2 to 4, characterized in that said compound is incorporated by immersion of the core or of the molded component in a liquid comprising said compound.

6. The process as claimed in one of the preceding claims, characterized in that said core is made of a ceramic material.

7. The process as claimed in one of the preceding claims, characterized in that said molded component is a turbomachine blade.

8. The process as claimed in one of the preceding claims, characterized in that said ionizing radiation exhibits an energy of greater than approximately 10 eV.

9. The process as claimed in one of the preceding claims, characterized in that said ionizing radiation belongs to a group comprising X-rays and gamma rays.

10. The process as claimed in one of the preceding claims, characterized in that said compound is diiodomethane.

11. The process as claimed in one of claims 1 to 9, characterized in that said compound is iodomethane.