To overcome these disadvantages sel

为了克服这些缺点，还选择了一些粉状补骨脂。图7显示了一个经翘曲的样品的微观结构。可以看出，<br>尽管样品尚未完全致密，但晶界既不包含其他相也不包含孔。现在，电阻率在约10 cm的有利范围内，即使在空气中1000℃下再氧化2小时后，也保持在该范围内。

To overcome these disadvantages selected powder compacts were hip in addition. The microstructure of a hipped sample is shown in Fig. 7. It can be seen that the grain<br>boundaries neither contain other phases nor pores although the sample is not fully dense yet. The electrical resistivity is now in the favorable range of about 10 cm and is maintained in this range even after reoxidation at 1000 ◦C for 2 h in air.

为了克服这些缺点，所选的粉末复合材料也很时髦。hipped样品的微观结构如图7所示。可以看出<br>尽管样品尚未完全致密，但边界既不包含其他相，也不含孔隙。电阻率现在在10 cm左右的有利范围内，即使在1000°C的空气中再氧化2小时后，仍然保持在该范围内。