Two-part study toward lowest uncertainty calibration of ceramic gauge blocks: interferometry and mechanical comparison techniques

Uncertainty of Mechanical Calibration of Gauge Blocks of Dissimilar Materials

“…The reason for avoiding calibration of gauge blocks dissimilar materials lies in differences of their temperature extension and mechanical effects. Bigger calibration laboratories avoid the need for calibrating gauge blocks of dissimilar materials by acquiring additional reference set of tungsten carbide and/or ceramics, which is then interferometric calibrated (Decker et al, 2001). Unfortunately small laboratories have too small a customer base in these materials to justify the expense of additional reference sets (Mudronja et al, 2004).…”